642467267674 has 4 divisors (see below), whose sum is σ = 963700901514. Its totient is φ = 321233633836.

The previous prime is 642467267671. The next prime is 642467267681. The reversal of 642467267674 is 476762764246.

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

It can be written as a sum of positive squares in only one way, i.e., 322288967025 + 320178300649 = 567705^2 + 565843^2 .

It is not an unprimeable number, because it can be changed into a prime (642467267671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160616816917 + ... + 160616816920.

Almost surely, 2^642467267674 is an apocalyptic number.

642467267674 is a deficient number, since it is larger than the sum of its proper divisors (321233633840).

642467267674 is a wasteful number, since it uses less digits than its factorization.

642467267674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321233633839.

The product of its digits is 113799168, while the sum is 61.

The spelling of 642467267674 in words is "six hundred forty-two billion, four hundred sixty-seven million, two hundred sixty-seven thousand, six hundred seventy-four".