180840377531 has 16 divisors (see below), whose sum is σ = 198211442688. Its totient is φ = 163624833600.

The previous prime is 180840377521. The next prime is 180840377551. The reversal of 180840377531 is 135773048081.

It is a cyclic number.

It is not a de Polignac number, because 180840377531 - 2⁶ = 180840377467 is a prime.

It is a super-2 number, since 2×180840377531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180840377521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19170386 + ... + 19179816.

It is an arithmetic number, because the mean of its divisors is an integer number (12388215168).

Almost surely, 2^180840377531 is an apocalyptic number.

180840377531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

180840377531 is a deficient number, since it is larger than the sum of its proper divisors (17371065157).

180840377531 is a wasteful number, since it uses less digits than its factorization.

180840377531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17482.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 180840377531 in words is "one hundred eighty billion, eight hundred forty million, three hundred seventy-seven thousand, five hundred thirty-one".