699457461780 has 576 divisors, whose sum is σ = 2679134976000. Its totient is φ = 132938910720.

The previous prime is 699457461779. The next prime is 699457461797. The reversal of 699457461780 is 87164754996.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 27989331 + ... + 28014309.

It is an arithmetic number, because the mean of its divisors is an integer number (4651276000).

Almost surely, 2^699457461780 is an apocalyptic number.

699457461780 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 699457461780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339567488000).

699457461780 is an abundant number, since it is smaller than the sum of its proper divisors (1979677514220).

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

699457461780 is a wasteful number, since it uses less digits than its factorization.

699457461780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25068 (or 25055 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 66.

The spelling of 699457461780 in words is "six hundred ninety-nine billion, four hundred fifty-seven million, four hundred sixty-one thousand, seven hundred eighty".