64603897770 has 32 divisors (see below), whose sum is σ = 155915565120. Its totient is φ = 17131460480.

The previous prime is 64603897741. The next prime is 64603897789. The reversal of 64603897770 is 7779830646.

It is a super-2 number, since 2×64603897770² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64603897770.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6009891 + ... + 6020630.

It is an arithmetic number, because the mean of its divisors is an integer number (4872361410).

Almost surely, 2^64603897770 is an apocalyptic number.

64603897770 is an abundant number, since it is smaller than the sum of its proper divisors (91311667350).

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

64603897770 is a wasteful number, since it uses less digits than its factorization.

64603897770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12030710.

The product of its (nonzero) digits is 10668672, while the sum is 57.

The spelling of 64603897770 in words is "sixty-four billion, six hundred three million, eight hundred ninety-seven thousand, seven hundred seventy".