155548639400 has 192 divisors, whose sum is σ = 453921840000. Its totient is φ = 48156595200.

The previous prime is 155548639387. The next prime is 155548639427. The reversal of 155548639400 is 4936845551.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2260706 + ... + 2328494.

It is an arithmetic number, because the mean of its divisors is an integer number (2364176250).

Almost surely, 2^155548639400 is an apocalyptic number.

155548639400 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 155548639400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226960920000).

155548639400 is an abundant number, since it is smaller than the sum of its proper divisors (298373200600).

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

155548639400 is a wasteful number, since it uses less digits than its factorization.

155548639400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67972 (or 67963 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 50.

The spelling of 155548639400 in words is "one hundred fifty-five billion, five hundred forty-eight million, six hundred thirty-nine thousand, four hundred".