51620005437 has 32 divisors (see below), whose sum is σ = 92410644480. Its totient is φ = 24752848320.

The previous prime is 51620005427. The next prime is 51620005511. The reversal of 51620005437 is 73450002615.

It is not a de Polignac number, because 51620005437 - 2¹⁰ = 51620004413 is a prime.

It is a super-2 number, since 2×51620005437² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 51620005398 and 51620005407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51620005427) 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, 8591737 + ... + 8597742.

It is an arithmetic number, because the mean of its divisors is an integer number (2887832640).

Almost surely, 2^51620005437 is an apocalyptic number.

It is an amenable number.

51620005437 is a deficient number, since it is larger than the sum of its proper divisors (40790639043).

51620005437 is a wasteful number, since it uses less digits than its factorization.

51620005437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17189513.

The product of its (nonzero) digits is 25200, while the sum is 33.

The spelling of 51620005437 in words is "fifty-one billion, six hundred twenty million, five thousand, four hundred thirty-seven".