13072137986 has 8 divisors (see below), whose sum is σ = 19637344524. Its totient is φ = 6526356480.

The previous prime is 13072137961. The next prime is 13072138069. The reversal of 13072137986 is 68973127031.

It can be written as a sum of positive squares in 2 ways, for example, as 12528548761 + 543589225 = 111931^2 + 23315^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13072137986.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4854575 + ... + 4857266.

Almost surely, 2^13072137986 is an apocalyptic number.

13072137986 is a deficient number, since it is larger than the sum of its proper divisors (6565206538).

13072137986 is an equidigital number, since it uses as much as digits as its factorization.

13072137986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9712516.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 13072137986 in words is "thirteen billion, seventy-two million, one hundred thirty-seven thousand, nine hundred eighty-six".