51601457544 has 128 divisors (see below), whose sum is σ = 162152202240. Its totient is φ = 13319592192.

The previous prime is 51601457507. The next prime is 51601457561. The reversal of 51601457544 is 44575410615.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 51601457496 and 51601457505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148704 + ... + 353999.

It is an arithmetic number, because the mean of its divisors is an integer number (1266814080).

Almost surely, 2^51601457544 is an apocalyptic number.

It is an amenable number.

51601457544 is an abundant number, since it is smaller than the sum of its proper divisors (110550744696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51601457544 is a wasteful number, since it uses less digits than its factorization.

51601457544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502779 (or 502775 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 42.

The spelling of 51601457544 in words is "fifty-one billion, six hundred one million, four hundred fifty-seven thousand, five hundred forty-four".