51461021758 has 8 divisors (see below), whose sum is σ = 77199358680. Its totient is φ = 25727902200.

The previous prime is 51461021743. The next prime is 51461021783. The reversal of 51461021758 is 85712016415.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51461021758.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1279588 + ... + 1319191.

It is an arithmetic number, because the mean of its divisors is an integer number (9649919835).

Almost surely, 2^51461021758 is an apocalyptic number.

51461021758 is a deficient number, since it is larger than the sum of its proper divisors (25738336922).

51461021758 is a wasteful number, since it uses less digits than its factorization.

51461021758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608682.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 51461021758 in words is "fifty-one billion, four hundred sixty-one million, twenty-one thousand, seven hundred fifty-eight".