51256156403 has 8 divisors (see below), whose sum is σ = 51748656960. Its totient is φ = 50764060800.

The previous prime is 51256156387. The next prime is 51256156421. The reversal of 51256156403 is 30465165215.

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 51256156403 - 2⁴ = 51256156387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51256156433) 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, 156251 + ... + 356267.

It is an arithmetic number, because the mean of its divisors is an integer number (6468582120).

Almost surely, 2^51256156403 is an apocalyptic number.

51256156403 is a deficient number, since it is larger than the sum of its proper divisors (492500557).

51256156403 is a wasteful number, since it uses less digits than its factorization.

51256156403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202477.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 51256156403 in words is "fifty-one billion, two hundred fifty-six million, one hundred fifty-six thousand, four hundred three".