64525831844623 has 16 divisors (see below), whose sum is σ = 66233795337216. Its totient is φ = 62839091276640.

The previous prime is 64525831844533. The next prime is 64525831844629. The reversal of 64525831844623 is 32644813852546.

It is a cyclic number.

It is not a de Polignac number, because 64525831844623 - 2²¹ = 64525829747471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64525831844629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30018036 + ... + 32095702.

It is an arithmetic number, because the mean of its divisors is an integer number (4139612208576).

Almost surely, 2^{64525831844623} is an apocalyptic number.

64525831844623 is a deficient number, since it is larger than the sum of its proper divisors (1707963492593).

64525831844623 is a wasteful number, since it uses less digits than its factorization.

64525831844623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082774.

The product of its digits is 132710400, while the sum is 61.

The spelling of 64525831844623 in words is "sixty-four trillion, five hundred twenty-five billion, eight hundred thirty-one million, eight hundred forty-four thousand, six hundred twenty-three".