187491544972 has 12 divisors (see below), whose sum is σ = 328699274400. Its totient is φ = 93577466576.

The previous prime is 187491544967. The next prime is 187491544973. The reversal of 187491544972 is 279445194781.

It is a self number, because there is not a number n which added to its sum of digits gives 187491544972.

It is not an unprimeable number, because it can be changed into a prime (187491544973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42073972 + ... + 42078427.

It is an arithmetic number, because the mean of its divisors is an integer number (27391606200).

Almost surely, 2^187491544972 is an apocalyptic number.

It is an amenable number.

187491544972 is a deficient number, since it is larger than the sum of its proper divisors (141207729428).

187491544972 is a wasteful number, since it uses less digits than its factorization.

187491544972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84152960 (or 84152958 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 61.

The spelling of 187491544972 in words is "one hundred eighty-seven billion, four hundred ninety-one million, five hundred forty-four thousand, nine hundred seventy-two".