817132640725 has 96 divisors (see below), whose sum is σ = 1110337683840. Its totient is φ = 594206269440.

The previous prime is 817132640699. The next prime is 817132640789. The reversal of 817132640725 is 527046231718.

It is not a de Polignac number, because 817132640725 - 2¹⁵ = 817132607957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 410000329 + ... + 410002321.

It is an arithmetic number, because the mean of its divisors is an integer number (11566017540).

Almost surely, 2^817132640725 is an apocalyptic number.

817132640725 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

817132640725 is a deficient number, since it is larger than the sum of its proper divisors (293205043115).

817132640725 is a wasteful number, since it uses less digits than its factorization.

817132640725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359 (or 2354 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 817132640725 in words is "eight hundred seventeen billion, one hundred thirty-two million, six hundred forty thousand, seven hundred twenty-five".