61402597888 has 40 divisors (see below), whose sum is σ = 124163490528. Its totient is φ = 30331382784.

The previous prime is 61402597859. The next prime is 61402597897. The reversal of 61402597888 is 88879520416.

It is a happy number.

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, 679956 + ... + 764947.

Almost surely, 2^61402597888 is an apocalyptic number.

It is an amenable number.

61402597888 is an abundant number, since it is smaller than the sum of its proper divisors (62760892640).

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

61402597888 is an equidigital number, since it uses as much as digits as its factorization.

61402597888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445004 (or 1444988 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 58.

The spelling of 61402597888 in words is "sixty-one billion, four hundred two million, five hundred ninety-seven thousand, eight hundred eighty-eight".