245615553 has 12 divisors (see below), whose sum is σ = 356330260. Its totient is φ = 163027296.

The previous prime is 245615549. The next prime is 245615593. The reversal of 245615553 is 355516542.

245615553 is a `hidden beast` number, since 2 + 45 + 61 + 5 + 553 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 228251664 + 17363889 = 15108^2 + 4167^2 .

It is not a de Polignac number, because 245615553 - 2² = 245615549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245615533) 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, 57526 + ... + 61647.

Almost surely, 2^245615553 is an apocalyptic number.

It is an amenable number.

245615553 is a deficient number, since it is larger than the sum of its proper divisors (110714707).

245615553 is a wasteful number, since it uses less digits than its factorization.

245615553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119408 (or 119405 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 245615553 is about 15672.1266265941. The cubic root of 245615553 is about 626.2560791598.

The spelling of 245615553 in words is "two hundred forty-five million, six hundred fifteen thousand, five hundred fifty-three".