642928674770 has 128 divisors (see below), whose sum is σ = 1286266355712. Its totient is φ = 230307840000.

The previous prime is 642928674769. The next prime is 642928674809. The reversal of 642928674770 is 77476829246.

It is a happy number.

It is a super-3 number, since 3×642928674770³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 75625520 + ... + 75634020.

It is an arithmetic number, because the mean of its divisors is an integer number (10048955904).

Almost surely, 2^642928674770 is an apocalyptic number.

642928674770 is an abundant number, since it is smaller than the sum of its proper divisors (643337680942).

642928674770 is a wasteful number, since it uses less digits than its factorization.

642928674770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8796.

The product of its (nonzero) digits is 56899584, while the sum is 62.

It can be divided in two parts, 6429286 and 74770, that added together give a palindrome (6504056).

The spelling of 642928674770 in words is "six hundred forty-two billion, nine hundred twenty-eight million, six hundred seventy-four thousand, seven hundred seventy".