187578728361 has 12 divisors (see below), whose sum is σ = 272026525680. Its totient is φ = 124554267000.

The previous prime is 187578728341. The next prime is 187578728437. The reversal of 187578728361 is 163827875781.

187578728361 is a `hidden beast` number, since 1 + 8 + 7 + 578 + 7 + 28 + 36 + 1 = 666.

It is not a de Polignac number, because 187578728361 - 2¹⁵ = 187578695593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (187578728341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41515831 + ... + 41520348.

It is an arithmetic number, because the mean of its divisors is an integer number (22668877140).

Almost surely, 2^187578728361 is an apocalyptic number.

It is an amenable number.

187578728361 is a deficient number, since it is larger than the sum of its proper divisors (84447797319).

187578728361 is a wasteful number, since it uses less digits than its factorization.

187578728361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83036436 (or 83036433 counting only the distinct ones).

The product of its digits is 31610880, while the sum is 63.

The spelling of 187578728361 in words is "one hundred eighty-seven billion, five hundred seventy-eight million, seven hundred twenty-eight thousand, three hundred sixty-one".