959561639440 has 80 divisors (see below), whose sum is σ = 2464920056448. Its totient is φ = 345540343808.

The previous prime is 959561639411. The next prime is 959561639453. The reversal of 959561639440 is 44936165959.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15306982 + ... + 15369541.

Almost surely, 2^959561639440 is an apocalyptic number.

It is an amenable number.

959561639440 is an abundant number, since it is smaller than the sum of its proper divisors (1505358417008).

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

959561639440 is a wasteful number, since it uses less digits than its factorization.

959561639440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30676576 (or 30676570 counting only the distinct ones).

The product of its (nonzero) digits is 31492800, while the sum is 61.

The spelling of 959561639440 in words is "nine hundred fifty-nine billion, five hundred sixty-one million, six hundred thirty-nine thousand, four hundred forty".