625436537 has 6 divisors (see below), whose sum is σ = 687463434. Its totient is φ = 568578560.

The previous prime is 625436489. The next prime is 625436549. The reversal of 625436537 is 735634526.

It can be written as a sum of positive squares in only one way, i.e., 446519161 + 178917376 = 21131^2 + 13376^2 .

It is not a de Polignac number, because 625436537 - 2²⁰ = 624387961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 625436494 and 625436503.

It is not an unprimeable number, because it can be changed into a prime (625436557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2584328 + ... + 2584569.

It is an arithmetic number, because the mean of its divisors is an integer number (114577239).

Almost surely, 2^625436537 is an apocalyptic number.

It is an amenable number.

625436537 is a deficient number, since it is larger than the sum of its proper divisors (62026897).

625436537 is a wasteful number, since it uses less digits than its factorization.

625436537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168919 (or 5168908 counting only the distinct ones).

The product of its digits is 453600, while the sum is 41.

The square root of 625436537 is about 25008.7292160158. The cubic root of 625436537 is about 855.1869850836.

The spelling of 625436537 in words is "six hundred twenty-five million, four hundred thirty-six thousand, five hundred thirty-seven".