799257657240 has 576 divisors, whose sum is σ = 3061416720960. Its totient is φ = 180298137600.

The previous prime is 799257657199. The next prime is 799257657271. The reversal of 799257657240 is 42756752997.

799257657240 is a `hidden beast` number, since 7 + 9 + 9 + 2 + 57 + 6 + 572 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 728584372 + ... + 728585468.

It is an arithmetic number, because the mean of its divisors is an integer number (5314959585).

Almost surely, 2^799257657240 is an apocalyptic number.

799257657240 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 799257657240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1530708360480).

799257657240 is an abundant number, since it is smaller than the sum of its proper divisors (2262159063720).

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

799257657240 is a wasteful number, since it uses less digits than its factorization.

799257657240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632 (or 1618 counting only the distinct ones).

The product of its (nonzero) digits is 66679200, while the sum is 63.

The spelling of 799257657240 in words is "seven hundred ninety-nine billion, two hundred fifty-seven million, six hundred fifty-seven thousand, two hundred forty".