64252021252544 has 56 divisors (see below), whose sum is σ = 128161564860000. Its totient is φ = 31959395804160.

The previous prime is 64252021252537. The next prime is 64252021252561. The reversal of 64252021252544 is 44525212025246.

It is a junction number, because it is equal to n+sod(n) for n = 64252021252495 and 64252021252504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78825182 + ... + 79636130.

It is an arithmetic number, because the mean of its divisors is an integer number (2288599372500).

Almost surely, 2^{64252021252544} is an apocalyptic number.

64252021252544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64252021252544 is a deficient number, since it is larger than the sum of its proper divisors (63909543607456).

64252021252544 is a wasteful number, since it uses less digits than its factorization.

64252021252544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817381 (or 817371 counting only the distinct ones).

The product of its (nonzero) digits is 1536000, while the sum is 44.

The spelling of 64252021252544 in words is "sixty-four trillion, two hundred fifty-two billion, twenty-one million, two hundred fifty-two thousand, five hundred forty-four".