1397771172492 has 96 divisors (see below), whose sum is σ = 3580360056000. Its totient is φ = 422451412992.

The previous prime is 1397771172431. The next prime is 1397771172527. The reversal of 1397771172492 is 2942711777931.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2393178 + ... + 2919390.

It is an arithmetic number, because the mean of its divisors is an integer number (37295417250).

Almost surely, 2^{1397771172492} is an apocalyptic number.

1397771172492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397771172492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1790180028000).

1397771172492 is an abundant number, since it is smaller than the sum of its proper divisors (2182588883508).

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

1397771172492 is a wasteful number, since it uses less digits than its factorization.

1397771172492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526715 (or 526713 counting only the distinct ones).

The product of its digits is 9335088, while the sum is 60.

The spelling of 1397771172492 in words is "one trillion, three hundred ninety-seven billion, seven hundred seventy-one million, one hundred seventy-two thousand, four hundred ninety-two".