64920402892799 has 4 divisors (see below), whose sum is σ = 67014609437760. Its totient is φ = 62826196347840.

The previous prime is 64920402892789. The next prime is 64920402892883. The reversal of 64920402892799 is 99729820402946.

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

It is a cyclic number.

It is not a de Polignac number, because 64920402892799 - 2⁴⁰ = 63820891265023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64920402892789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047103272434 + ... + 1047103272495.

It is an arithmetic number, because the mean of its divisors is an integer number (16753652359440).

Almost surely, 2^{64920402892799} is an apocalyptic number.

64920402892799 is a deficient number, since it is larger than the sum of its proper divisors (2094206544961).

64920402892799 is a wasteful number, since it uses less digits than its factorization.

64920402892799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094206544960.

The product of its (nonzero) digits is 282175488, while the sum is 71.

It can be divided in two parts, 6492040 and 2892799, that added together give a palindrome (9384839).

The spelling of 64920402892799 in words is "sixty-four trillion, nine hundred twenty billion, four hundred two million, eight hundred ninety-two thousand, seven hundred ninety-nine".