61897535588 has 36 divisors (see below), whose sum is σ = 126024756480. Its totient is φ = 26523502992.

The previous prime is 61897535521. The next prime is 61897535599. The reversal of 61897535588 is 88553579816.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1533773 + ... + 1573611.

It is an arithmetic number, because the mean of its divisors is an integer number (3500687680).

Almost surely, 2^61897535588 is an apocalyptic number.

It is an amenable number.

61897535588 is an abundant number, since it is smaller than the sum of its proper divisors (64127220892).

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

61897535588 is a wasteful number, since it uses less digits than its factorization.

61897535588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47784 (or 47775 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 65.

The spelling of 61897535588 in words is "sixty-one billion, eight hundred ninety-seven million, five hundred thirty-five thousand, five hundred eighty-eight".