874646126621 has 4 divisors (see below), whose sum is σ = 878399972892. Its totient is φ = 870892280352.

The previous prime is 874646126593. The next prime is 874646126623. The reversal of 874646126621 is 126621646478.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126621646478 = 2 ⋅63310823239.

It can be written as a sum of positive squares in 2 ways, for example, as 462468002500 + 412178124121 = 680050^2 + 642011^2 .

It is a cyclic number.

It is not a de Polignac number, because 874646126621 - 2²² = 874641932317 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 (874646126623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1876922786 + ... + 1876923251.

It is an arithmetic number, because the mean of its divisors is an integer number (219599993223).

Almost surely, 2^874646126621 is an apocalyptic number.

It is an amenable number.

874646126621 is a deficient number, since it is larger than the sum of its proper divisors (3753846271).

874646126621 is a wasteful number, since it uses less digits than its factorization.

874646126621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753846270.

The product of its digits is 4644864, while the sum is 53.

The spelling of 874646126621 in words is "eight hundred seventy-four billion, six hundred forty-six million, one hundred twenty-six thousand, six hundred twenty-one".