64905891330 has 64 divisors (see below), whose sum is σ = 183770431488. Its totient is φ = 14357062080.

The previous prime is 64905891329. The next prime is 64905891331. The reversal of 64905891330 is 3319850946.

It is an interprime number because it is at equal distance from previous prime (64905891329) and next prime (64905891331).

It is a self number, because there is not a number n which added to its sum of digits gives 64905891330.

It is not an unprimeable number, because it can be changed into a prime (64905891331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4978582 + ... + 4991601.

It is an arithmetic number, because the mean of its divisors is an integer number (2871412992).

Almost surely, 2^64905891330 is an apocalyptic number.

64905891330 is an abundant number, since it is smaller than the sum of its proper divisors (118864540158).

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

64905891330 is a wasteful number, since it uses less digits than its factorization.

64905891330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9970231.

The product of its (nonzero) digits is 699840, while the sum is 48.

The spelling of 64905891330 in words is "sixty-four billion, nine hundred five million, eight hundred ninety-one thousand, three hundred thirty".