155913798240 has 96 divisors (see below), whose sum is σ = 545698308960. Its totient is φ = 41577011712.

The previous prime is 155913798221. The next prime is 155913798269. The reversal of 155913798240 is 42897319551.

It is a happy number.

155913798240 is a `hidden beast` number, since 1 + 5 + 591 + 3 + 7 + 9 + 8 + 2 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×155913798240² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18041259 + ... + 18049898.

It is an arithmetic number, because the mean of its divisors is an integer number (5684357385).

Almost surely, 2^155913798240 is an apocalyptic number.

155913798240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155913798240 is an abundant number, since it is smaller than the sum of its proper divisors (389784510720).

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

155913798240 is a wasteful number, since it uses less digits than its factorization.

155913798240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36091181 (or 36091167 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 155913798240 in words is "one hundred fifty-five billion, nine hundred thirteen million, seven hundred ninety-eight thousand, two hundred forty".