1625463645 has 32 divisors (see below), whose sum is σ = 2846734464. Its totient is φ = 787104000.

The previous prime is 1625463611. The next prime is 1625463673. The reversal of 1625463645 is 5463645261.

It is not a de Polignac number, because 1625463645 - 2¹¹ = 1625461597 is a prime.

It is a super-2 number, since 2×1625463645² = 5284264122433372050, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1625463597 and 1625463606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56431 + ... + 80220.

It is an arithmetic number, because the mean of its divisors is an integer number (88960452).

Almost surely, 2^1625463645 is an apocalyptic number.

1625463645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1625463645 is a deficient number, since it is larger than the sum of its proper divisors (1221270819).

1625463645 is a wasteful number, since it uses less digits than its factorization.

1625463645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136733.

The product of its digits is 518400, while the sum is 42.

The square root of 1625463645 is about 40317.0391397980. The cubic root of 1625463645 is about 1175.7791470300.

The spelling of 1625463645 in words is "one billion, six hundred twenty-five million, four hundred sixty-three thousand, six hundred forty-five".