213877888660 has 24 divisors (see below), whose sum is σ = 451652755680. Its totient is φ = 85073214624.

The previous prime is 213877888621. The next prime is 213877888663. The reversal of 213877888660 is 66888778312.

It is a happy number.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 213877888592 and 213877888601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213877888663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29867634 + ... + 29874793.

It is an arithmetic number, because the mean of its divisors is an integer number (18818864820).

Almost surely, 2^213877888660 is an apocalyptic number.

213877888660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213877888660 is an abundant number, since it is smaller than the sum of its proper divisors (237774867020).

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

213877888660 is a wasteful number, since it uses less digits than its factorization.

213877888660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59742615 (or 59742613 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 64.

The spelling of 213877888660 in words is "two hundred thirteen billion, eight hundred seventy-seven million, eight hundred eighty-eight thousand, six hundred sixty".