155580745320 has 1536 divisors, whose sum is σ = 738688204800. Its totient is φ = 27321753600.

The previous prime is 155580745303. The next prime is 155580745343. The reversal of 155580745320 is 23547085551.

155580745320 is a `hidden beast` number, since 1 + 5 + 5 + 580 + 7 + 45 + 3 + 20 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 212251674 + ... + 212252406.

It is an arithmetic number, because the mean of its divisors is an integer number (480916800).

Almost surely, 2^155580745320 is an apocalyptic number.

155580745320 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 155580745320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369344102400).

155580745320 is an abundant number, since it is smaller than the sum of its proper divisors (583107459480).

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

155580745320 is a wasteful number, since it uses less digits than its factorization.

155580745320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 45.

The spelling of 155580745320 in words is "one hundred fifty-five billion, five hundred eighty million, seven hundred forty-five thousand, three hundred twenty".