180481491 has 12 divisors (see below), whose sum is σ = 260991120. Its totient is φ = 120184560.

The previous prime is 180481481. The next prime is 180481507. The reversal of 180481491 is 194184081.

It is a de Polignac number, because none of the positive numbers 2^k-180481491 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (180481421) 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, 2640 + ... + 19181.

It is an arithmetic number, because the mean of its divisors is an integer number (21749260).

Almost surely, 2^180481491 is an apocalyptic number.

180481491 is a deficient number, since it is larger than the sum of its proper divisors (80509629).

180481491 is a wasteful number, since it uses less digits than its factorization.

180481491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22746 (or 22743 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 180481491 is about 13434.3399912314. The cubic root of 180481491 is about 565.1246139630.

It can be divided in two parts, 180 and 481491, that added together give a triangular number (481671 = T₉₈₁).

The spelling of 180481491 in words is "one hundred eighty million, four hundred eighty-one thousand, four hundred ninety-one".