797788862640 has 1440 divisors, whose sum is σ = 3505764188160. Its totient is φ = 160692940800.

The previous prime is 797788862639. The next prime is 797788862641. The reversal of 797788862640 is 46268887797.

It is an interprime number because it is at equal distance from previous prime (797788862639) and next prime (797788862641).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (797788862641) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 3483794046 + ... + 3483794274.

It is an arithmetic number, because the mean of its divisors is an integer number (2434558464).

Almost surely, 2^797788862640 is an apocalyptic number.

797788862640 is a gapful number since it is divisible by the number (70) 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 797788862640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1752882094080).

797788862640 is an abundant number, since it is smaller than the sum of its proper divisors (2707975325520).

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

797788862640 is a wasteful number, since it uses less digits than its factorization.

797788862640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 455196672, while the sum is 72.

The spelling of 797788862640 in words is "seven hundred ninety-seven billion, seven hundred eighty-eight million, eight hundred sixty-two thousand, six hundred forty".