870641434140642 has 32 divisors (see below), whose sum is σ = 1936949862394560. Its totient is φ = 289885143401280.

The previous prime is 870641434140623. The next prime is 870641434140721. The reversal of 870641434140642 is 246041434146078.

It is a happy number.

870641434140642 is a `hidden beast` number, since 8 + 7 + 0 + 6 + 4 + 1 + 434 + 140 + 64 + 2 = 666.

It is a super-2 number, since 2×870641434140642² (a number of 31 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9129617959 + ... + 9129713322.

It is an arithmetic number, because the mean of its divisors is an integer number (60529683199830).

Almost surely, 2^{870641434140642} is an apocalyptic number.

870641434140642 is an abundant number, since it is smaller than the sum of its proper divisors (1066308428253918).

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

870641434140642 is a wasteful number, since it uses less digits than its factorization.

870641434140642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18259332175 (or 18259332169 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 54.

The spelling of 870641434140642 in words is "eight hundred seventy trillion, six hundred forty-one billion, four hundred thirty-four million, one hundred forty thousand, six hundred forty-two".