155554445451 has 4 divisors (see below), whose sum is σ = 207405927272. Its totient is φ = 103702963632.

The previous prime is 155554445419. The next prime is 155554445507. The reversal of 155554445451 is 154544455551.

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

It is not a de Polignac number, because 155554445451 - 2⁵ = 155554445419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155554445451.

It is not an unprimeable number, because it can be changed into a prime (155554445251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25925740906 + ... + 25925740911.

It is an arithmetic number, because the mean of its divisors is an integer number (51851481818).

Almost surely, 2^155554445451 is an apocalyptic number.

155554445451 is a deficient number, since it is larger than the sum of its proper divisors (51851481821).

155554445451 is an equidigital number, since it uses as much as digits as its factorization.

155554445451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51851481820.

The product of its digits is 4000000, while the sum is 48.

The spelling of 155554445451 in words is "one hundred fifty-five billion, five hundred fifty-four million, four hundred forty-five thousand, four hundred fifty-one".