187149681664 has 99 divisors (see below), whose sum is σ = 411553941421. Its totient is φ = 84998819840.

The previous prime is 187149681647. The next prime is 187149681683. The reversal of 187149681664 is 466186941781.

The square root of 187149681664 is 432608.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 184721163264 + 2428518400 = 429792^2 + 49280^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 152277402 + ... + 152278630.

Almost surely, 2^187149681664 is an apocalyptic number.

187149681664 is the 432608-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187149681664

187149681664 is an abundant number, since it is smaller than the sum of its proper divisors (224404259757).

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

187149681664 is an frugal number, since it uses more digits than its factorization.

187149681664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500 (or 1242 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 61.

The spelling of 187149681664 in words is "one hundred eighty-seven billion, one hundred forty-nine million, six hundred eighty-one thousand, six hundred sixty-four".