1297830547818 has 48 divisors (see below), whose sum is σ = 3222291511296. Its totient is φ = 369814589280.

The previous prime is 1297830547763. The next prime is 1297830547823. The reversal of 1297830547818 is 8187450387921.

1297830547818 is a `hidden beast` number, since 1 + 2 + 9 + 7 + 8 + 3 + 0 + 547 + 81 + 8 = 666.

It is a super-2 number, since 2×1297830547818² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13760298 + ... + 13854293.

It is an arithmetic number, because the mean of its divisors is an integer number (67131073152).

Almost surely, 2^{1297830547818} is an apocalyptic number.

1297830547818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1297830547818 is an abundant number, since it is smaller than the sum of its proper divisors (1924460963478).

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

1297830547818 is a wasteful number, since it uses less digits than its factorization.

1297830547818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27614979 (or 27614976 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 63.

The spelling of 1297830547818 in words is "one trillion, two hundred ninety-seven billion, eight hundred thirty million, five hundred forty-seven thousand, eight hundred eighteen".