1553869401 has 8 divisors (see below), whose sum is σ = 2367801024. Its totient is φ = 887925360.

The previous prime is 1553869391. The next prime is 1553869403. The reversal of 1553869401 is 1049683551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1553869401 - 2¹⁰ = 1553868377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1553869403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36996870 + ... + 36996911.

It is an arithmetic number, because the mean of its divisors is an integer number (295975128).

Almost surely, 2^1553869401 is an apocalyptic number.

It is an amenable number.

1553869401 is a deficient number, since it is larger than the sum of its proper divisors (813931623).

1553869401 is an equidigital number, since it uses as much as digits as its factorization.

1553869401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73993791.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 1553869401 is about 39419.1501810985. The cubic root of 1553869401 is about 1158.2567456404.

The spelling of 1553869401 in words is "one billion, five hundred fifty-three million, eight hundred sixty-nine thousand, four hundred one".