51183927432 has 128 divisors (see below), whose sum is σ = 155338128000. Its totient is φ = 15486750720.

The previous prime is 51183927419. The next prime is 51183927449. The reversal of 51183927432 is 23472938115.

It is a happy number.

51183927432 is a `hidden beast` number, since 51 + 1 + 83 + 92 + 7 + 432 = 666.

It is a super-2 number, since 2×51183927432² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1583044 + ... + 1615052.

It is an arithmetic number, because the mean of its divisors is an integer number (1213579125).

Almost surely, 2^51183927432 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 51183927432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77669064000).

51183927432 is an abundant number, since it is smaller than the sum of its proper divisors (104154200568).

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

51183927432 is a wasteful number, since it uses less digits than its factorization.

51183927432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32708 (or 32698 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 51183927432 in words is "fifty-one billion, one hundred eighty-three million, nine hundred twenty-seven thousand, four hundred thirty-two".