1553405399 has 12 divisors (see below), whose sum is σ = 1946025144. Its totient is φ = 1229067504.

The previous prime is 1553405389. The next prime is 1553405407. The reversal of 1553405399 is 9935043551.

It is a de Polignac number, because none of the positive numbers 2^k-1553405399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553405309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1218677 + ... + 1219950.

It is an arithmetic number, because the mean of its divisors is an integer number (162168762).

Almost surely, 2^1553405399 is an apocalyptic number.

1553405399 is a deficient number, since it is larger than the sum of its proper divisors (392619745).

1553405399 is a wasteful number, since it uses less digits than its factorization.

1553405399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438654 (or 2438647 counting only the distinct ones).

The product of its (nonzero) digits is 364500, while the sum is 44.

The square root of 1553405399 is about 39413.2642520256. The cubic root of 1553405399 is about 1158.1414448844.

The spelling of 1553405399 in words is "one billion, five hundred fifty-three million, four hundred five thousand, three hundred ninety-nine".