641572677 has 16 divisors (see below), whose sum is σ = 1000504000. Its totient is φ = 405203472.

The previous prime is 641572663. The next prime is 641572697. The reversal of 641572677 is 776275146.

641572677 is a `hidden beast` number, since 6 + 4 + 1 + 572 + 6 + 77 = 666.

It is not a de Polignac number, because 641572677 - 2¹² = 641568581 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 (641572627) 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 15 ways as a sum of consecutive naturals, for example, 624802 + ... + 625827.

It is an arithmetic number, because the mean of its divisors is an integer number (62531500).

Almost surely, 2^641572677 is an apocalyptic number.

It is an amenable number.

641572677 is a deficient number, since it is larger than the sum of its proper divisors (358931323).

641572677 is a wasteful number, since it uses less digits than its factorization.

641572677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250657 (or 1250651 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 641572677 is about 25329.2849681944. The cubic root of 641572677 is about 862.4791798377.

The spelling of 641572677 in words is "six hundred forty-one million, five hundred seventy-two thousand, six hundred seventy-seven".