427644256374 has 64 divisors (see below), whose sum is σ = 991847738880. Its totient is φ = 136321621920.

The previous prime is 427644256373. The next prime is 427644256393. The reversal of 427644256374 is 473652446724.

427644256374 is a `hidden beast` number, since 4 + 2 + 7 + 6 + 4 + 4 + 2 + 563 + 74 = 666.

It is a super-2 number, since 2×427644256374² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 427644256374.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427644256373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6309184 + ... + 6376604.

It is an arithmetic number, because the mean of its divisors is an integer number (15497620920).

Almost surely, 2^427644256374 is an apocalyptic number.

427644256374 is an abundant number, since it is smaller than the sum of its proper divisors (564203482506).

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

427644256374 is a wasteful number, since it uses less digits than its factorization.

427644256374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72562 (or 72556 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 54.

The spelling of 427644256374 in words is "four hundred twenty-seven billion, six hundred forty-four million, two hundred fifty-six thousand, three hundred seventy-four".