691550650560 has 224 divisors, whose sum is σ = 2737463127552. Its totient is φ = 143698821120.

The previous prime is 691550650543. The next prime is 691550650577. The reversal of 691550650560 is 65056055196.

It is an interprime number because it is at equal distance from previous prime (691550650543) and next prime (691550650577).

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4603777 + ... + 4751616.

Almost surely, 2^691550650560 is an apocalyptic number.

691550650560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

691550650560 is an abundant number, since it is smaller than the sum of its proper divisors (2045912476992).

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

691550650560 is a wasteful number, since it uses less digits than its factorization.

691550650560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9355431 (or 9355421 counting only the distinct ones).

The product of its (nonzero) digits is 1215000, while the sum is 48.

The spelling of 691550650560 in words is "six hundred ninety-one billion, five hundred fifty million, six hundred fifty thousand, five hundred sixty".