61604528888 has 32 divisors (see below), whose sum is σ = 133818065760. Its totient is φ = 26040268800.

The previous prime is 61604528873. The next prime is 61604528893. The reversal of 61604528888 is 88882540616.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 7530713 + ... + 7538888.

It is an arithmetic number, because the mean of its divisors is an integer number (4181814555).

Almost surely, 2^61604528888 is an apocalyptic number.

It is an amenable number.

61604528888 is an abundant number, since it is smaller than the sum of its proper divisors (72213536872).

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

61604528888 is a wasteful number, since it uses less digits than its factorization.

61604528888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15069687 (or 15069683 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 56.

The spelling of 61604528888 in words is "sixty-one billion, six hundred four million, five hundred twenty-eight thousand, eight hundred eighty-eight".