420057192157 has 4 divisors (see below), whose sum is σ = 423982960416. Its totient is φ = 416131423900.

The previous prime is 420057192143. The next prime is 420057192161. The reversal of 420057192157 is 751291750024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420057192157 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 (420057199157) 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, 1962883969 + ... + 1962884182.

It is an arithmetic number, because the mean of its divisors is an integer number (105995740104).

Almost surely, 2^420057192157 is an apocalyptic number.

It is an amenable number.

420057192157 is a deficient number, since it is larger than the sum of its proper divisors (3925768259).

420057192157 is a wasteful number, since it uses less digits than its factorization.

420057192157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3925768258.

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 420057192157 in words is "four hundred twenty billion, fifty-seven million, one hundred ninety-two thousand, one hundred fifty-seven".