642772612 has 6 divisors (see below), whose sum is σ = 1124852078. Its totient is φ = 321386304.

The previous prime is 642772583. The next prime is 642772619. The reversal of 642772612 is 216277246.

It can be written as a sum of positive squares in only one way, i.e., 642318336 + 454276 = 25344^2 + 674^2 .

It is not an unprimeable number, because it can be changed into a prime (642772619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80346573 + ... + 80346580.

Almost surely, 2^642772612 is an apocalyptic number.

It is an amenable number.

642772612 is a deficient number, since it is larger than the sum of its proper divisors (482079466).

642772612 is a wasteful number, since it uses less digits than its factorization.

642772612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160693157 (or 160693155 counting only the distinct ones).

The product of its digits is 56448, while the sum is 37.

The square root of 642772612 is about 25352.9606160701. The cubic root of 642772612 is about 863.0165439626.

The spelling of 642772612 in words is "six hundred forty-two million, seven hundred seventy-two thousand, six hundred twelve".