51720029674 has 8 divisors (see below), whose sum is σ = 80082626688. Its totient is φ = 25025820780.

The previous prime is 51720029663. The next prime is 51720029677. The reversal of 51720029674 is 47692002715.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51720029674² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51720029674.

It is not an unprimeable number, because it can be changed into a prime (51720029677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417096952 + ... + 417097075.

It is an arithmetic number, because the mean of its divisors is an integer number (10010328336).

Almost surely, 2^51720029674 is an apocalyptic number.

51720029674 is a deficient number, since it is larger than the sum of its proper divisors (28362597014).

51720029674 is a wasteful number, since it uses less digits than its factorization.

51720029674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834194060.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 51720029674 in words is "fifty-one billion, seven hundred twenty million, twenty-nine thousand, six hundred seventy-four".