643201615642110 has 64 divisors (see below), whose sum is σ = 1780698091110912. Its totient is φ = 145643516701056.

The previous prime is 643201615642081. The next prime is 643201615642297. The reversal of 643201615642110 is 11246516102346.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 14312430037 + ... + 14312474976.

It is an arithmetic number, because the mean of its divisors is an integer number (27823407673608).

Almost surely, 2^{643201615642110} is an apocalyptic number.

643201615642110 is an abundant number, since it is smaller than the sum of its proper divisors (1137496475468802).

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

643201615642110 is a wasteful number, since it uses less digits than its factorization.

643201615642110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28624905137.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 643201615642110 in words is "six hundred forty-three trillion, two hundred one billion, six hundred fifteen million, six hundred forty-two thousand, one hundred ten".