1297518448740 has 48 divisors (see below), whose sum is σ = 3649343405568. Its totient is φ = 344453324544.

The previous prime is 1297518448729. The next prime is 1297518448747. The reversal of 1297518448740 is 478448157921.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (1297518448747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48473857 + ... + 48500616.

It is an arithmetic number, because the mean of its divisors is an integer number (76027987616).

Almost surely, 2^{1297518448740} is an apocalyptic number.

1297518448740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297518448740 is an abundant number, since it is smaller than the sum of its proper divisors (2351824956828).

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

1297518448740 is a wasteful number, since it uses less digits than its factorization.

1297518448740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96974708 (or 96974706 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 60.

The spelling of 1297518448740 in words is "one trillion, two hundred ninety-seven billion, five hundred eighteen million, four hundred forty-eight thousand, seven hundred forty".