157859643440 has 20 divisors (see below), whose sum is σ = 367023671184. Its totient is φ = 63143857344.

The previous prime is 157859643421. The next prime is 157859643463. The reversal of 157859643440 is 44346958751.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

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 3 ways as a sum of consecutive naturals, for example, 986622692 + ... + 986622851.

Almost surely, 2^157859643440 is an apocalyptic number.

157859643440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157859643440 is an abundant number, since it is smaller than the sum of its proper divisors (209164027744).

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

157859643440 is a wasteful number, since it uses less digits than its factorization.

157859643440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973245556 (or 1973245550 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 157859643440 in words is "one hundred fifty-seven billion, eight hundred fifty-nine million, six hundred forty-three thousand, four hundred forty".