155878456320 has 704 divisors, whose sum is σ = 617597913600. Its totient is φ = 37052743680.

The previous prime is 155878456319. The next prime is 155878456373. The reversal of 155878456320 is 23654878551.

155878456320 is a `hidden beast` number, since 1 + 5 + 5 + 8 + 78 + 4 + 563 + 2 + 0 = 666.

It is a super-2 number, since 2×155878456320² (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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44649775 + ... + 44653265.

Almost surely, 2^155878456320 is an apocalyptic number.

155878456320 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 155878456320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308798956800).

155878456320 is an abundant number, since it is smaller than the sum of its proper divisors (461719457280).

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

155878456320 is a wasteful number, since it uses less digits than its factorization.

155878456320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3561 (or 3537 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 54.

The spelling of 155878456320 in words is "one hundred fifty-five billion, eight hundred seventy-eight million, four hundred fifty-six thousand, three hundred twenty".