642492683770 has 64 divisors (see below), whose sum is σ = 1378041569280. Its totient is φ = 211012445952.

The previous prime is 642492683737. The next prime is 642492683839. The reversal of 642492683770 is 77386294246.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 988249 + ... + 1503868.

It is an arithmetic number, because the mean of its divisors is an integer number (21531899520).

Almost surely, 2^642492683770 is an apocalyptic number.

642492683770 is an abundant number, since it is smaller than the sum of its proper divisors (735548885510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642492683770 is a wasteful number, since it uses less digits than its factorization.

642492683770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492287.

The product of its (nonzero) digits is 24385536, while the sum is 58.

The spelling of 642492683770 in words is "six hundred forty-two billion, four hundred ninety-two million, six hundred eighty-three thousand, seven hundred seventy".