64920402892798 has 4 divisors (see below), whose sum is σ = 97380604339200. Its totient is φ = 32460201446398.

The previous prime is 64920402892789. The next prime is 64920402892883. The reversal of 64920402892798 is 89729820402946.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16230100723198 + ... + 16230100723201.

It is an arithmetic number, because the mean of its divisors is an integer number (24345151084800).

Almost surely, 2^{64920402892798} is an apocalyptic number.

64920402892798 is a deficient number, since it is larger than the sum of its proper divisors (32460201446402).

64920402892798 is a wasteful number, since it uses less digits than its factorization.

64920402892798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32460201446401.

The product of its (nonzero) digits is 250822656, while the sum is 70.

The spelling of 64920402892798 in words is "sixty-four trillion, nine hundred twenty billion, four hundred two million, eight hundred ninety-two thousand, seven hundred ninety-eight".