155400251455 has 4 divisors (see below), whose sum is σ = 186480301752. Its totient is φ = 124320201160.

The previous prime is 155400251441. The next prime is 155400251459. The reversal of 155400251455 is 554152004551.

155400251455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 155400251455 - 2²⁵ = 155366697023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155400251459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15540025141 + ... + 15540025150.

It is an arithmetic number, because the mean of its divisors is an integer number (46620075438).

Almost surely, 2^155400251455 is an apocalyptic number.

155400251455 is a deficient number, since it is larger than the sum of its proper divisors (31080050297).

155400251455 is an equidigital number, since it uses as much as digits as its factorization.

155400251455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31080050296.

The product of its (nonzero) digits is 100000, while the sum is 37.

The spelling of 155400251455 in words is "one hundred fifty-five billion, four hundred million, two hundred fifty-one thousand, four hundred fifty-five".