671615492427432 has 144 divisors (see below), whose sum is σ = 2115948821418900. Its totient is φ = 191888566410240.

The previous prime is 671615492427391. The next prime is 671615492427433. The reversal of 671615492427432 is 234724294516176.

671615492427432 is a `hidden beast` number, since 6 + 7 + 1 + 6 + 1 + 5 + 492 + 42 + 74 + 32 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 639444203370756 + 32171289056676 = 25287234^2 + 5671974^2 .

It is a super-2 number, since 2×671615492427432² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 671615492427432.

It is not an unprimeable number, because it can be changed into a prime (671615492427433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 469430544 + ... + 470859072.

Almost surely, 2^{671615492427432} is an apocalyptic number.

It is an amenable number.

671615492427432 is an abundant number, since it is smaller than the sum of its proper divisors (1444333328991468).

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

671615492427432 is a wasteful number, since it uses less digits than its factorization.

671615492427432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561816 (or 1561802 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 63.

The spelling of 671615492427432 in words is "six hundred seventy-one trillion, six hundred fifteen billion, four hundred ninety-two million, four hundred twenty-seven thousand, four hundred thirty-two".