671551442826 has 64 divisors (see below), whose sum is σ = 1474930667520. Its totient is φ = 202150650240.

The previous prime is 671551442819. The next prime is 671551442843. The reversal of 671551442826 is 628244155176.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23039830 + ... + 23068958.

It is an arithmetic number, because the mean of its divisors is an integer number (23045791680).

Almost surely, 2^671551442826 is an apocalyptic number.

671551442826 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

671551442826 is an abundant number, since it is smaller than the sum of its proper divisors (803379224694).

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

671551442826 is a wasteful number, since it uses less digits than its factorization.

671551442826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31451.

The product of its digits is 3225600, while the sum is 51.

The spelling of 671551442826 in words is "six hundred seventy-one billion, five hundred fifty-one million, four hundred forty-two thousand, eight hundred twenty-six".