1316206165520 has 20 divisors (see below), whose sum is σ = 3060179335020. Its totient is φ = 526482466176.

The previous prime is 1316206165499. The next prime is 1316206165541. The reversal of 1316206165520 is 255616026131.

It is an interprime number because it is at equal distance from previous prime (1316206165499) and next prime (1316206165541).

It can be written as a sum of positive squares in 2 ways, for example, as 173085953296 + 1143120212224 = 416036^2 + 1069168^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 8226288455 + ... + 8226288614.

It is an arithmetic number, because the mean of its divisors is an integer number (153008966751).

Almost surely, 2^{1316206165520} is an apocalyptic number.

1316206165520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1316206165520 is an abundant number, since it is smaller than the sum of its proper divisors (1743973169500).

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

1316206165520 is a wasteful number, since it uses less digits than its factorization.

1316206165520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16452577082 (or 16452577076 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 1316206165520 in words is "one trillion, three hundred sixteen billion, two hundred six million, one hundred sixty-five thousand, five hundred twenty".