16501507380 has 48 divisors (see below), whose sum is σ = 51338024640. Its totient is φ = 4400401824.

The previous prime is 16501507367. The next prime is 16501507381. The reversal of 16501507380 is 8370510561.

16501507380 is a `hidden beast` number, since 1 + 6 + 501 + 5 + 0 + 73 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16501507381) 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, 15278634 + ... + 15279713.

It is an arithmetic number, because the mean of its divisors is an integer number (1069542180).

Almost surely, 2^16501507380 is an apocalyptic number.

16501507380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16501507380 is an abundant number, since it is smaller than the sum of its proper divisors (34836517260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16501507380 is a wasteful number, since it uses less digits than its factorization.

16501507380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30558365 (or 30558357 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 16501507380 in words is "sixteen billion, five hundred one million, five hundred seven thousand, three hundred eighty".