6421692257874 has 96 divisors (see below), whose sum is σ = 14742106816320. Its totient is φ = 2014630285824.

The previous prime is 6421692257861. The next prime is 6421692257927. The reversal of 6421692257874 is 4787522961246.

6421692257874 is a `hidden beast` number, since 6 + 4 + 216 + 92 + 257 + 87 + 4 = 666.

It is a super-2 number, since 2×6421692257874² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35209942 + ... + 35391854.

It is an arithmetic number, because the mean of its divisors is an integer number (153563612670).

Almost surely, 2^{6421692257874} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6421692257874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7371053408160).

6421692257874 is an abundant number, since it is smaller than the sum of its proper divisors (8320414558446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6421692257874 is a wasteful number, since it uses less digits than its factorization.

6421692257874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182616 (or 182613 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 63.

The spelling of 6421692257874 in words is "six trillion, four hundred twenty-one billion, six hundred ninety-two million, two hundred fifty-seven thousand, eight hundred seventy-four".