64977880001 has 4 divisors (see below), whose sum is σ = 65139920004. Its totient is φ = 64815840000.

The previous prime is 64977879997. The next prime is 64977880013. The reversal of 64977880001 is 10008877946.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55849032976 + 9128847025 = 236324^2 + 95545^2 .

It is a cyclic number.

It is not a de Polignac number, because 64977880001 - 2² = 64977879997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64977880081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81019400 + ... + 81020201.

It is an arithmetic number, because the mean of its divisors is an integer number (16284980001).

Almost surely, 2^64977880001 is an apocalyptic number.

It is an amenable number.

64977880001 is a deficient number, since it is larger than the sum of its proper divisors (162040003).

64977880001 is a wasteful number, since it uses less digits than its factorization.

64977880001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162040002.

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 64977880001 in words is "sixty-four billion, nine hundred seventy-seven million, eight hundred eighty thousand, one".