787172070440 has 32 divisors (see below), whose sum is σ = 2024156753280. Its totient is φ = 269887566912.

The previous prime is 787172070437. The next prime is 787172070499. The reversal of 787172070440 is 44070271787.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1405664132 + ... + 1405664691.

It is an arithmetic number, because the mean of its divisors is an integer number (63254898540).

Almost surely, 2^787172070440 is an apocalyptic number.

787172070440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

787172070440 is an abundant number, since it is smaller than the sum of its proper divisors (1236984682840).

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

787172070440 is a wasteful number, since it uses less digits than its factorization.

787172070440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811328841 (or 2811328837 counting only the distinct ones).

The product of its (nonzero) digits is 614656, while the sum is 47.

The spelling of 787172070440 in words is "seven hundred eighty-seven billion, one hundred seventy-two million, seventy thousand, four hundred forty".