155016617400 has 480 divisors, whose sum is σ = 560345385600. Its totient is φ = 39670041600.

The previous prime is 155016617389. The next prime is 155016617447. The reversal of 155016617400 is 4716610551.

It is a happy number.

155016617400 is a `hidden beast` number, since 1 + 550 + 1 + 6 + 61 + 7 + 40 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 85032889 + ... + 85034711.

It is an arithmetic number, because the mean of its divisors is an integer number (1167386220).

Almost surely, 2^155016617400 is an apocalyptic number.

155016617400 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 155016617400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280172692800).

155016617400 is an abundant number, since it is smaller than the sum of its proper divisors (405328768200).

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

155016617400 is a wasteful number, since it uses less digits than its factorization.

155016617400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061 (or 2043 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 155016617400 in words is "one hundred fifty-five billion, sixteen million, six hundred seventeen thousand, four hundred".