51956498993 has 8 divisors (see below), whose sum is σ = 60385277760. Its totient is φ = 43779325680.

The previous prime is 51956498989. The next prime is 51956499019. The reversal of 51956498993 is 39989465915.

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

It is a cyclic number.

It is not a de Polignac number, because 51956498993 - 2² = 51956498989 is a prime.

It is a super-2 number, since 2×51956498993² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51956498983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62900918 + ... + 62901743.

It is an arithmetic number, because the mean of its divisors is an integer number (7548159720).

Almost surely, 2^51956498993 is an apocalyptic number.

It is an amenable number.

51956498993 is a deficient number, since it is larger than the sum of its proper divisors (8428778767).

51956498993 is a wasteful number, since it uses less digits than its factorization.

51956498993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125802727.

The product of its digits is 94478400, while the sum is 68.

The spelling of 51956498993 in words is "fifty-one billion, nine hundred fifty-six million, four hundred ninety-eight thousand, nine hundred ninety-three".