51663615625622 has 128 divisors (see below), whose sum is σ = 106479543582720. Its totient is φ = 18146519475840.

The previous prime is 51663615625621. The next prime is 51663615625637. The reversal of 51663615625622 is 22652651636615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51663615625621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1231267079 + ... + 1231309037.

It is an arithmetic number, because the mean of its divisors is an integer number (831871434240).

Almost surely, 2^{51663615625622} is an apocalyptic number.

51663615625622 is an abundant number, since it is smaller than the sum of its proper divisors (54815927957098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51663615625622 is a wasteful number, since it uses less digits than its factorization.

51663615625622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56338.

The product of its digits is 23328000, while the sum is 56.

The spelling of 51663615625622 in words is "fifty-one trillion, six hundred sixty-three billion, six hundred fifteen million, six hundred twenty-five thousand, six hundred twenty-two".