51621750552495 has 64 divisors (see below), whose sum is σ = 91011828280320. Its totient is φ = 24868835177472.

The previous prime is 51621750552401. The next prime is 51621750552503. The reversal of 51621750552495 is 59425505712615.

It is not a de Polignac number, because 51621750552495 - 2⁷ = 51621750552367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10528432 + ... + 14631861.

It is an arithmetic number, because the mean of its divisors is an integer number (1422059816880).

Almost surely, 2^{51621750552495} is an apocalyptic number.

51621750552495 is a deficient number, since it is larger than the sum of its proper divisors (39390077727825).

51621750552495 is a wasteful number, since it uses less digits than its factorization.

51621750552495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25160656.

The product of its (nonzero) digits is 18900000, while the sum is 57.

The spelling of 51621750552495 in words is "fifty-one trillion, six hundred twenty-one billion, seven hundred fifty million, five hundred fifty-two thousand, four hundred ninety-five".