1297998891580 has 24 divisors (see below), whose sum is σ = 2728993250592. Its totient is φ = 518590875072.

The previous prime is 1297998891569. The next prime is 1297998891587. The reversal of 1297998891580 is 851988997921.

It is a super-2 number, since 2×1297998891580² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1297998891497 and 1297998891506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297998891587) 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, 38025112 + ... + 38059231.

It is an arithmetic number, because the mean of its divisors is an integer number (113708052108).

Almost surely, 2^{1297998891580} is an apocalyptic number.

1297998891580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297998891580 is an abundant number, since it is smaller than the sum of its proper divisors (1430994359012).

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

1297998891580 is a wasteful number, since it uses less digits than its factorization.

1297998891580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76085205 (or 76085203 counting only the distinct ones).

The product of its (nonzero) digits is 235146240, while the sum is 76.

The spelling of 1297998891580 in words is "one trillion, two hundred ninety-seven billion, nine hundred ninety-eight million, eight hundred ninety-one thousand, five hundred eighty".