51453522416421 has 32 divisors (see below), whose sum is σ = 78687374131200. Its totient is φ = 33195405867120.

The previous prime is 51453522416327. The next prime is 51453522416431. The reversal of 51453522416421 is 12461422535415.

51453522416421 is a `hidden beast` number, since 5 + 1 + 4 + 5 + 3 + 522 + 41 + 64 + 21 = 666.

It is not a de Polignac number, because 51453522416421 - 2⁹ = 51453522415909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51453522416431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75559360 + ... + 76237286.

It is an arithmetic number, because the mean of its divisors is an integer number (2458980441600).

Almost surely, 2^{51453522416421} is an apocalyptic number.

It is an amenable number.

51453522416421 is a deficient number, since it is larger than the sum of its proper divisors (27233851714779).

51453522416421 is a wasteful number, since it uses less digits than its factorization.

51453522416421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768646 (or 768640 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The spelling of 51453522416421 in words is "fifty-one trillion, four hundred fifty-three billion, five hundred twenty-two million, four hundred sixteen thousand, four hundred twenty-one".