671612461 has 4 divisors (see below), whose sum is σ = 723274972. Its totient is φ = 619949952.

The previous prime is 671612441. The next prime is 671612467. The reversal of 671612461 is 164216176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 314175625 + 357436836 = 17725^2 + 18906^2 .

It is a cyclic number.

It is not a de Polignac number, because 671612461 - 2⁵ = 671612429 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 (671612467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25831236 + ... + 25831261.

It is an arithmetic number, because the mean of its divisors is an integer number (180818743).

Almost surely, 2^671612461 is an apocalyptic number.

It is an amenable number.

671612461 is a deficient number, since it is larger than the sum of its proper divisors (51662511).

671612461 is a wasteful number, since it uses less digits than its factorization.

671612461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51662510.

The product of its digits is 12096, while the sum is 34.

The square root of 671612461 is about 25915.4868949051. The cubic root of 671612461 is about 875.7354191646.

The spelling of 671612461 in words is "six hundred seventy-one million, six hundred twelve thousand, four hundred sixty-one".