51240861793 has 8 divisors (see below), whose sum is σ = 56307146400. Its totient is φ = 46242581280.

The previous prime is 51240861787. The next prime is 51240861817. The reversal of 51240861793 is 39716804215.

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 51240861793 - 2⁵ = 51240861761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51240861773) 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, 16999443 + ... + 17002456.

It is an arithmetic number, because the mean of its divisors is an integer number (7038393300).

It is a 1-persistent number, because it is pandigital, but 2⋅51240861793 = 102481723586 is not.

Almost surely, 2^51240861793 is an apocalyptic number.

It is an amenable number.

51240861793 is a deficient number, since it is larger than the sum of its proper divisors (5066284607).

51240861793 is a wasteful number, since it uses less digits than its factorization.

51240861793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34002047.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 51240861793 in words is "fifty-one billion, two hundred forty million, eight hundred sixty-one thousand, seven hundred ninety-three".