61649125528 has 32 divisors (see below), whose sum is σ = 118431628560. Its totient is φ = 30067614720.

The previous prime is 61649125519. The next prime is 61649125543. The reversal of 61649125528 is 82552194616.

It is a happy number.

It is a super-2 number, since 2×61649125528² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2520976 + ... + 2545312.

Almost surely, 2^61649125528 is an apocalyptic number.

It is an amenable number.

61649125528 is a deficient number, since it is larger than the sum of its proper divisors (56782503032).

61649125528 is a wasteful number, since it uses less digits than its factorization.

61649125528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32107 (or 32103 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 49.

The spelling of 61649125528 in words is "sixty-one billion, six hundred forty-nine million, one hundred twenty-five thousand, five hundred twenty-eight".