64977820743 has 24 divisors (see below), whose sum is σ = 99369615744. Its totient is φ = 37668297040.

The previous prime is 64977820717. The next prime is 64977820751. The reversal of 64977820743 is 34702877946.

It is not a de Polignac number, because 64977820743 - 2⁶ = 64977820679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64977820043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3883005 + ... + 3899702.

It is an arithmetic number, because the mean of its divisors is an integer number (4140400656).

Almost surely, 2^64977820743 is an apocalyptic number.

64977820743 is a deficient number, since it is larger than the sum of its proper divisors (34391795001).

64977820743 is a wasteful number, since it uses less digits than its factorization.

64977820743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782755 (or 7782744 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 57.

The spelling of 64977820743 in words is "sixty-four billion, nine hundred seventy-seven million, eight hundred twenty thousand, seven hundred forty-three".