690465578880 has 1024 divisors, whose sum is σ = 2878189977600. Its totient is φ = 136519680000.

The previous prime is 690465578861. The next prime is 690465578893. The reversal of 690465578880 is 88875564096.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 853479916 + ... + 853480724.

It is an arithmetic number, because the mean of its divisors is an integer number (2810732400).

Almost surely, 2^690465578880 is an apocalyptic number.

690465578880 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 690465578880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439094988800).

690465578880 is an abundant number, since it is smaller than the sum of its proper divisors (2187724398720).

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

690465578880 is a wasteful number, since it uses less digits than its factorization.

690465578880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123 (or 1111 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 66.

The spelling of 690465578880 in words is "six hundred ninety billion, four hundred sixty-five million, five hundred seventy-eight thousand, eight hundred eighty".