155415403400 has 48 divisors (see below), whose sum is σ = 361458115200. Its totient is φ = 62145980480.

The previous prime is 155415403399. The next prime is 155415403427. The reversal of 155415403400 is 4304514551.

It is a super-3 number, since 3×155415403400³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 499229 + ... + 748371.

It is an arithmetic number, because the mean of its divisors is an integer number (7530377400).

Almost surely, 2^155415403400 is an apocalyptic number.

155415403400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155415403400 is an abundant number, since it is smaller than the sum of its proper divisors (206042711800).

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

155415403400 is a wasteful number, since it uses less digits than its factorization.

155415403400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252278 (or 252269 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 155415403400 its reverse (4304514551), we get a palindrome (159719917951).

The spelling of 155415403400 in words is "one hundred fifty-five billion, four hundred fifteen million, four hundred three thousand, four hundred".