86855642523642 has 16 divisors (see below), whose sum is σ = 175248553057920. Its totient is φ = 28695669506112.

The previous prime is 86855642523589. The next prime is 86855642523653. The reversal of 86855642523642 is 24632524655868.

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, 64052833042 + ... + 64052834397.

It is an arithmetic number, because the mean of its divisors is an integer number (10953034566120).

Almost surely, 2^{86855642523642} is an apocalyptic number.

86855642523642 is an abundant number, since it is smaller than the sum of its proper divisors (88392910534278).

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

86855642523642 is a wasteful number, since it uses less digits than its factorization.

86855642523642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128105667557.

The product of its digits is 663552000, while the sum is 66.

The spelling of 86855642523642 in words is "eighty-six trillion, eight hundred fifty-five billion, six hundred forty-two million, five hundred twenty-three thousand, six hundred forty-two".