187699385680 has 80 divisors (see below), whose sum is σ = 446279025600. Its totient is φ = 73394554880.

The previous prime is 187699385617. The next prime is 187699385693. The reversal of 187699385680 is 86583996781.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 733800 + ... + 955960.

It is an arithmetic number, because the mean of its divisors is an integer number (5578487820).

Almost surely, 2^187699385680 is an apocalyptic number.

187699385680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187699385680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223139512800).

187699385680 is an abundant number, since it is smaller than the sum of its proper divisors (258579639920).

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

187699385680 is a wasteful number, since it uses less digits than its factorization.

187699385680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222412 (or 222406 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 70.

The spelling of 187699385680 in words is "one hundred eighty-seven billion, six hundred ninety-nine million, three hundred eighty-five thousand, six hundred eighty".