690921943950 has 48 divisors (see below), whose sum is σ = 1958270198400. Its totient is φ = 157925015520.

The previous prime is 690921943919. The next prime is 690921943973. The reversal of 690921943950 is 59349129096.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 329009400 + ... + 329011499.

It is an arithmetic number, because the mean of its divisors is an integer number (40797295800).

Almost surely, 2^690921943950 is an apocalyptic number.

690921943950 is an abundant number, since it is smaller than the sum of its proper divisors (1267348254450).

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

690921943950 is a wasteful number, since it uses less digits than its factorization.

690921943950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658020921 (or 658020916 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 57.

The spelling of 690921943950 in words is "six hundred ninety billion, nine hundred twenty-one million, nine hundred forty-three thousand, nine hundred fifty".