50156451421 has 4 divisors (see below), whose sum is σ = 50843526172. Its totient is φ = 49469376672.

The previous prime is 50156451413. The next prime is 50156451437. The reversal of 50156451421 is 12415465105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12415465105 = 5 ⋅2483093021.

It can be written as a sum of positive squares in 2 ways, for example, as 10471428900 + 39685022521 = 102330^2 + 199211^2 .

It is a cyclic number.

It is not a de Polignac number, because 50156451421 - 2³ = 50156451413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50156454421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343537266 + ... + 343537411.

It is an arithmetic number, because the mean of its divisors is an integer number (12710881543).

Almost surely, 2^50156451421 is an apocalyptic number.

It is an amenable number.

50156451421 is a deficient number, since it is larger than the sum of its proper divisors (687074751).

50156451421 is an equidigital number, since it uses as much as digits as its factorization.

50156451421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687074750.

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 50156451421 in words is "fifty billion, one hundred fifty-six million, four hundred fifty-one thousand, four hundred twenty-one".