51363719979912 has 640 divisors, whose sum is σ = 160668749577600. Its totient is φ = 15255242956800.

The previous prime is 51363719979877. The next prime is 51363719979947. The reversal of 51363719979912 is 21997991736315.

51363719979912 is a `hidden beast` number, since 5 + 1 + 363 + 7 + 199 + 79 + 9 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (51363719979877) and next prime (51363719979947).

It is a super-2 number, since 2×51363719979912² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 6450293643 + ... + 6450301605.

It is an arithmetic number, because the mean of its divisors is an integer number (251044921215).

Almost surely, 2^{51363719979912} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51363719979912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80334374788800).

51363719979912 is an abundant number, since it is smaller than the sum of its proper divisors (109305029597688).

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

51363719979912 is a wasteful number, since it uses less digits than its factorization.

51363719979912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8419 (or 8406 counting only the distinct ones).

The product of its digits is 173604060, while the sum is 72.

The spelling of 51363719979912 in words is "fifty-one trillion, three hundred sixty-three billion, seven hundred nineteen million, nine hundred seventy-nine thousand, nine hundred twelve".