642785587246 has 8 divisors (see below), whose sum is σ = 1051830960984. Its totient is φ = 292175266920.

The previous prime is 642785587237. The next prime is 642785587253.

642785587246 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×642785587246² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14608763325 + ... + 14608763368.

It is an arithmetic number, because the mean of its divisors is an integer number (131478870123).

Almost surely, 2^642785587246 is an apocalyptic number.

642785587246 is a deficient number, since it is larger than the sum of its proper divisors (409045373738).

642785587246 is a wasteful number, since it uses less digits than its factorization.

642785587246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29217526706.

The product of its digits is 180633600, while the sum is 64.

The spelling of 642785587246 in words is "six hundred forty-two billion, seven hundred eighty-five million, five hundred eighty-seven thousand, two hundred forty-six".