51972154844 has 48 divisors (see below), whose sum is σ = 95033917440. Its totient is φ = 24840689280.

The previous prime is 51972154823. The next prime is 51972154847. The reversal of 51972154844 is 44845127915.

It is a super-2 number, since 2×51972154844² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51972154792 and 51972154801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51972154847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16408949 + ... + 16412115.

It is an arithmetic number, because the mean of its divisors is an integer number (1979873280).

Almost surely, 2^51972154844 is an apocalyptic number.

It is an amenable number.

51972154844 is a deficient number, since it is larger than the sum of its proper divisors (43061762596).

51972154844 is a wasteful number, since it uses less digits than its factorization.

51972154844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4778 (or 4776 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 50.

The spelling of 51972154844 in words is "fifty-one billion, nine hundred seventy-two million, one hundred fifty-four thousand, eight hundred forty-four".