158717195840 has 56 divisors (see below), whose sum is σ = 431937517632. Its totient is φ = 54417323520.

The previous prime is 158717195839. The next prime is 158717195843. The reversal of 158717195840 is 48591717851.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×158717195840² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (158717195843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35425706 + ... + 35430185.

Almost surely, 2^158717195840 is an apocalyptic number.

158717195840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158717195840 is an abundant number, since it is smaller than the sum of its proper divisors (273220321792).

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

158717195840 is an equidigital number, since it uses as much as digits as its factorization.

158717195840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70855915 (or 70855905 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 56.

The spelling of 158717195840 in words is "one hundred fifty-eight billion, seven hundred seventeen million, one hundred ninety-five thousand, eight hundred forty".