51127940464 has 10 divisors (see below), whose sum is σ = 99060384680. Its totient is φ = 25563970224.

The previous prime is 51127940447. The next prime is 51127940467. The reversal of 51127940464 is 46404972115.

It is a super-2 number, since 2×51127940464² (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 51127940464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51127940467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1597748124 + ... + 1597748155.

It is an arithmetic number, because the mean of its divisors is an integer number (9906038468).

Almost surely, 2^51127940464 is an apocalyptic number.

It is an amenable number.

51127940464 is a deficient number, since it is larger than the sum of its proper divisors (47932444216).

51127940464 is a wasteful number, since it uses less digits than its factorization.

51127940464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195496287 (or 3195496281 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 51127940464 in words is "fifty-one billion, one hundred twenty-seven million, nine hundred forty thousand, four hundred sixty-four".