642701019946 has 16 divisors (see below), whose sum is σ = 1000360194048. Its totient is φ = 309356168400.

The previous prime is 642701019929. The next prime is 642701019991. The reversal of 642701019946 is 649910107246.

It is a self number, because there is not a number n which added to its sum of digits gives 642701019946.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27124665 + ... + 27148348.

It is an arithmetic number, because the mean of its divisors is an integer number (62522512128).

Almost surely, 2^642701019946 is an apocalyptic number.

642701019946 is a deficient number, since it is larger than the sum of its proper divisors (357659174102).

642701019946 is a wasteful number, since it uses less digits than its factorization.

642701019946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54273237.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 642701019946 in words is "six hundred forty-two billion, seven hundred one million, nineteen thousand, nine hundred forty-six".