187140148261 has 4 divisors (see below), whose sum is σ = 204152889024. Its totient is φ = 170127407500.

The previous prime is 187140148243. The next prime is 187140148297. The reversal of 187140148261 is 162841041781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 187140148261 - 2²⁷ = 187005930533 is a prime.

It is a super-2 number, since 2×187140148261² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187140148241) 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, 8506370365 + ... + 8506370386.

It is an arithmetic number, because the mean of its divisors is an integer number (51038222256).

Almost surely, 2^187140148261 is an apocalyptic number.

187140148261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

187140148261 is a deficient number, since it is larger than the sum of its proper divisors (17012740763).

187140148261 is a wasteful number, since it uses less digits than its factorization.

187140148261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17012740762.

The product of its (nonzero) digits is 86016, while the sum is 43.

The spelling of 187140148261 in words is "one hundred eighty-seven billion, one hundred forty million, one hundred forty-eight thousand, two hundred sixty-one".