51118191724 has 96 divisors (see below), whose sum is σ = 94666682880. Its totient is φ = 24130828800.

The previous prime is 51118191697. The next prime is 51118191727. The reversal of 51118191724 is 42719181115.

It is a super-2 number, since 2×51118191724² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51118191727) 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, 194365617 + ... + 194365879.

It is an arithmetic number, because the mean of its divisors is an integer number (986111280).

Almost surely, 2^51118191724 is an apocalyptic number.

It is an amenable number.

51118191724 is a deficient number, since it is larger than the sum of its proper divisors (43548491156).

51118191724 is a wasteful number, since it uses less digits than its factorization.

51118191724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 629 counting only the distinct ones).

The product of its digits is 20160, while the sum is 40.

The spelling of 51118191724 in words is "fifty-one billion, one hundred eighteen million, one hundred ninety-one thousand, seven hundred twenty-four".