15316803989691 has 8 divisors (see below), whose sum is σ = 20425606850880. Its totient is φ = 10209601894152.

The previous prime is 15316803989687. The next prime is 15316803989713. The reversal of 15316803989691 is 19698930861351.

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

It is not a de Polignac number, because 15316803989691 - 2² = 15316803989687 is a prime.

It is a super-2 number, since 2×15316803989691² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15316803989681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400169085 + ... + 400207358.

It is an arithmetic number, because the mean of its divisors is an integer number (2553200856360).

Almost surely, 2^{15316803989691} is an apocalyptic number.

15316803989691 is a deficient number, since it is larger than the sum of its proper divisors (5108802861189).

15316803989691 is an equidigital number, since it uses as much as digits as its factorization.

15316803989691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800382825.

The product of its (nonzero) digits is 75582720, while the sum is 69.

The spelling of 15316803989691 in words is "fifteen trillion, three hundred sixteen billion, eight hundred three million, nine hundred eighty-nine thousand, six hundred ninety-one".