187996707945 has 64 divisors (see below), whose sum is σ = 341574804480. Its totient is φ = 98075577600.

The previous prime is 187996707911. The next prime is 187996708019. The reversal of 187996707945 is 549707699781.

It is not a de Polignac number, because 187996707945 - 2⁶ = 187996707881 is a prime.

It is a super-2 number, since 2×187996707945² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1427472 + ... + 1553598.

It is an arithmetic number, because the mean of its divisors is an integer number (5337106320).

Almost surely, 2^187996707945 is an apocalyptic number.

187996707945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

187996707945 is a deficient number, since it is larger than the sum of its proper divisors (153578096535).

187996707945 is a wasteful number, since it uses less digits than its factorization.

187996707945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126383 (or 126377 counting only the distinct ones).

The product of its (nonzero) digits is 240045120, while the sum is 72.

The spelling of 187996707945 in words is "one hundred eighty-seven billion, nine hundred ninety-six million, seven hundred seven thousand, nine hundred forty-five".