64625501 has 4 divisors (see below), whose sum is σ = 64681404. Its totient is φ = 64569600.

The previous prime is 64625467. The next prime is 64625537. The reversal of 64625501 is 10552646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53728900 + 10896601 = 7330^2 + 3301^2 .

It is a cyclic number.

It is not a de Polignac number, because 64625501 - 2¹⁰ = 64624477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64625581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26180 + ... + 28541.

It is an arithmetic number, because the mean of its divisors is an integer number (16170351).

Almost surely, 2^64625501 is an apocalyptic number.

It is an amenable number.

64625501 is a deficient number, since it is larger than the sum of its proper divisors (55903).

64625501 is a wasteful number, since it uses less digits than its factorization.

64625501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55902.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 64625501 is about 8038.9987560641. The cubic root of 64625501 is about 401.2989046347.

The spelling of 64625501 in words is "sixty-four million, six hundred twenty-five thousand, five hundred one".