1553630897 has 24 divisors (see below), whose sum is σ = 1959489000. Its totient is φ = 1220921856.

The previous prime is 1553630879. The next prime is 1553630929. The reversal of 1553630897 is 7980363551.

It can be written as a sum of positive squares in 4 ways, for example, as 20830096 + 1532800801 = 4564^2 + 39151^2 .

It is not a de Polignac number, because 1553630897 - 2²⁶ = 1486522033 is a prime.

It is a super-2 number, since 2×1553630897² = 4827537928226049218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1553630597) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86729 + ... + 103097.

It is an arithmetic number, because the mean of its divisors is an integer number (81645375).

Almost surely, 2^1553630897 is an apocalyptic number.

It is an amenable number.

1553630897 is a deficient number, since it is larger than the sum of its proper divisors (405858103).

1553630897 is a wasteful number, since it uses less digits than its factorization.

1553630897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16545 (or 16538 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 47.

The square root of 1553630897 is about 39416.1248348947. The cubic root of 1553630897 is about 1158.1974821867.

The spelling of 1553630897 in words is "one billion, five hundred fifty-three million, six hundred thirty thousand, eight hundred ninety-seven".