1553772423 has 16 divisors (see below), whose sum is σ = 2369743616. Its totient is φ = 887086080.

The previous prime is 1553772397. The next prime is 1553772427. The reversal of 1553772423 is 3242773551.

It is not a de Polignac number, because 1553772423 - 2⁵ = 1553772391 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553772427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7873 + ... + 56298.

It is an arithmetic number, because the mean of its divisors is an integer number (148108976).

Almost surely, 2^1553772423 is an apocalyptic number.

1553772423 is a deficient number, since it is larger than the sum of its proper divisors (815971193).

1553772423 is a wasteful number, since it uses less digits than its factorization.

1553772423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65334.

The product of its digits is 176400, while the sum is 39.

The square root of 1553772423 is about 39417.9200745042. The cubic root of 1553772423 is about 1158.2326492868.

The spelling of 1553772423 in words is "one billion, five hundred fifty-three million, seven hundred seventy-two thousand, four hundred twenty-three".