16138620720 has 60 divisors (see below), whose sum is σ = 54198870336. Its totient is φ = 4303632000.

The previous prime is 16138620689. The next prime is 16138620721. The reversal of 16138620720 is 2702683161.

16138620720 is a `hidden beast` number, since 1 + 6 + 1 + 3 + 8 + 620 + 7 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is not an unprimeable number, because it can be changed into a prime (16138620721) 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, 11206656 + ... + 11208095.

Almost surely, 2^16138620720 is an apocalyptic number.

16138620720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16138620720 is an abundant number, since it is smaller than the sum of its proper divisors (38060249616).

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

16138620720 is a wasteful number, since it uses less digits than its factorization.

16138620720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22414770 (or 22414761 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

It can be divided in two parts, 161386 and 20720, that added together give a triangular number (182106 = T₆₀₃).

The spelling of 16138620720 in words is "sixteen billion, one hundred thirty-eight million, six hundred twenty thousand, seven hundred twenty".