158173998877440 has 4752 divisors, whose sum is σ = 739481862006720. Its totient is φ = 31693950812160.

The previous prime is 158173998877423. The next prime is 158173998877451. The reversal of 158173998877440 is 44778899371851.

158173998877440 is a `hidden beast` number, since 1 + 5 + 8 + 1 + 7 + 3 + 9 + 98 + 87 + 7 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 158173998877440.

It is an unprimeable number.

It is a polite number, since it can be written in 527 ways as a sum of consecutive naturals, for example, 2593016375010 + ... + 2593016375070.

Almost surely, 2^{158173998877440} is an apocalyptic number.

158173998877440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158173998877440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369740931003360).

158173998877440 is an abundant number, since it is smaller than the sum of its proper divisors (581307863129280).

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

158173998877440 is an frugal number, since it uses more digits than its factorization.

158173998877440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 3413975040, while the sum is 81.

The spelling of 158173998877440 in words is "one hundred fifty-eight trillion, one hundred seventy-three billion, nine hundred ninety-eight million, eight hundred seventy-seven thousand, four hundred forty".