642675577237 has 16 divisors (see below), whose sum is σ = 646340774400. Its totient is φ = 639024124032.

The previous prime is 642675577213. The next prime is 642675577241. The reversal of 642675577237 is 732775576246.

It is a cyclic number.

It is not a de Polignac number, because 642675577237 - 2²³ = 642667188629 is a prime.

It is a super-2 number, since 2×642675577237² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642675577207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210780889 + ... + 210783937.

It is an arithmetic number, because the mean of its divisors is an integer number (40396298400).

Almost surely, 2^642675577237 is an apocalyptic number.

It is an amenable number.

642675577237 is a deficient number, since it is larger than the sum of its proper divisors (3665197163).

642675577237 is a wasteful number, since it uses less digits than its factorization.

642675577237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4932.

The product of its digits is 103723200, while the sum is 61.

Subtracting 642675577237 from its reverse (732775576246), we obtain a palindrome (90099999009).

The spelling of 642675577237 in words is "six hundred forty-two billion, six hundred seventy-five million, five hundred seventy-seven thousand, two hundred thirty-seven".