1297618113672 has 80 divisors (see below), whose sum is σ = 3636135346140. Its totient is φ = 432348585984.

The previous prime is 1297618113661. The next prime is 1297618113679. The reversal of 1297618113672 is 2763118167921.

1297618113672 is a `hidden beast` number, since 1 + 2 + 9 + 7 + 618 + 1 + 13 + 6 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1296305210916 + 1312902756 = 1138554^2 + 36234^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1297618113679) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1032408 + ... + 1913400.

Almost surely, 2^{1297618113672} is an apocalyptic number.

1297618113672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1297618113672 is an abundant number, since it is smaller than the sum of its proper divisors (2338517232468).

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

1297618113672 is a wasteful number, since it uses less digits than its factorization.

1297618113672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883284 (or 883271 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The spelling of 1297618113672 in words is "one trillion, two hundred ninety-seven billion, six hundred eighteen million, one hundred thirteen thousand, six hundred seventy-two".