699872785920 has 1920 divisors, whose sum is σ = 3152948198400. Its totient is φ = 142194769920.

The previous prime is 699872785879. The next prime is 699872785921. The reversal of 699872785920 is 29587278996.

699872785920 is a `hidden beast` number, since 6 + 9 + 9 + 8 + 7 + 27 + 8 + 592 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699872785921) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7215183312 + ... + 7215183408.

It is an arithmetic number, because the mean of its divisors is an integer number (1642160520).

Almost surely, 2^699872785920 is an apocalyptic number.

699872785920 is a gapful number since it is divisible by the number (60) 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 699872785920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1576474099200).

699872785920 is an abundant number, since it is smaller than the sum of its proper divisors (2453075412480).

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

699872785920 is a wasteful number, since it uses less digits than its factorization.

699872785920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 274337280, while the sum is 72.

The spelling of 699872785920 in words is "six hundred ninety-nine billion, eight hundred seventy-two million, seven hundred eighty-five thousand, nine hundred twenty".