61525555264 has 28 divisors (see below), whose sum is σ = 123275124544. Its totient is φ = 30464106624.

The previous prime is 61525555229. The next prime is 61525555271. The reversal of 61525555264 is 46255552516.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4660092 + ... + 4673275.

Almost surely, 2^61525555264 is an apocalyptic number.

61525555264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

61525555264 is an abundant number, since it is smaller than the sum of its proper divisors (61749569280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61525555264 is a wasteful number, since it uses less digits than its factorization.

61525555264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9333482 (or 9333472 counting only the distinct ones).

The product of its digits is 1800000, while the sum is 46.

The spelling of 61525555264 in words is "sixty-one billion, five hundred twenty-five million, five hundred fifty-five thousand, two hundred sixty-four".