1397196912640 has 96 divisors (see below), whose sum is σ = 3443061716640. Its totient is φ = 543773786112.

The previous prime is 1397196912623. The next prime is 1397196912649. The reversal of 1397196912640 is 462196917931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397196912649) 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, 1464972 + ... + 2222731.

It is an arithmetic number, because the mean of its divisors is an integer number (35865226215).

Almost surely, 2^{1397196912640} is an apocalyptic number.

1397196912640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397196912640 is an abundant number, since it is smaller than the sum of its proper divisors (2045864804000).

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

1397196912640 is an equidigital number, since it uses as much as digits as its factorization.

1397196912640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687767 (or 3687747 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 58.

The spelling of 1397196912640 in words is "one trillion, three hundred ninety-seven billion, one hundred ninety-six million, nine hundred twelve thousand, six hundred forty".