671293455625 has 45 divisors (see below), whose sum is σ = 908699145849. Its totient is φ = 495527760000.

The previous prime is 671293455601. The next prime is 671293455629. The reversal of 671293455625 is 526554392176.

The square root of 671293455625 is 819325.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 22 ways, for example, as 12917004409 + 658376451216 = 113653^2 + 811404^2 .

It is not a de Polignac number, because 671293455625 - 2⁹ = 671293455113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671293455629) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 266279365 + ... + 266281885.

Almost surely, 2^671293455625 is an apocalyptic number.

671293455625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

671293455625 is the 819325-th square number.

671293455625 is the 409663-rd centered octagonal number.

It is an amenable number.

671293455625 is a deficient number, since it is larger than the sum of its proper divisors (237405690224).

671293455625 is an frugal number, since it uses more digits than its factorization.

671293455625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088 (or 2539 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 55.

The spelling of 671293455625 in words is "six hundred seventy-one billion, two hundred ninety-three million, four hundred fifty-five thousand, six hundred twenty-five".