642675577238 has 4 divisors (see below), whose sum is σ = 964013365860. Its totient is φ = 321337788618.

The previous prime is 642675577213. The next prime is 642675577241. The reversal of 642675577238 is 832775576246.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160668894308 + ... + 160668894311.

It is an arithmetic number, because the mean of its divisors is an integer number (241003341465).

Almost surely, 2^642675577238 is an apocalyptic number.

642675577238 is a deficient number, since it is larger than the sum of its proper divisors (321337788622).

642675577238 is a wasteful number, since it uses less digits than its factorization.

642675577238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321337788621.

The product of its digits is 118540800, while the sum is 62.

The spelling of 642675577238 in words is "six hundred forty-two billion, six hundred seventy-five million, five hundred seventy-seven thousand, two hundred thirty-eight".