155932439040 has 480 divisors, whose sum is σ = 640062783360. Its totient is φ = 35640705024.

The previous prime is 155932438973. The next prime is 155932439041. The reversal of 155932439040 is 40934239551.

155932439040 is a `hidden beast` number, since 1 + 5 + 593 + 24 + 39 + 0 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a super-2 number, since 2×155932439040² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (155932439041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4336656 + ... + 4372464.

It is an arithmetic number, because the mean of its divisors is an integer number (1333464132).

Almost surely, 2^155932439040 is an apocalyptic number.

155932439040 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 155932439040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320031391680).

155932439040 is an abundant number, since it is smaller than the sum of its proper divisors (484130344320).

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

155932439040 is an frugal number, since it uses more digits than its factorization.

155932439040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35854 (or 35826 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 155932439040 in words is "one hundred fifty-five billion, nine hundred thirty-two million, four hundred thirty-nine thousand, forty".