245623617 has 16 divisors (see below), whose sum is σ = 367493760. Its totient is φ = 162126000.

The previous prime is 245623613. The next prime is 245623657. The reversal of 245623617 is 716326542.

245623617 is a `hidden beast` number, since 24 + 5 + 623 + 6 + 1 + 7 = 666.

It is not a de Polignac number, because 245623617 - 2² = 245623613 is a prime.

It is a super-2 number, since 2×245623617² = 120661922456325378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (245623613) 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, 42309 + ... + 47762.

It is an arithmetic number, because the mean of its divisors is an integer number (22968360).

Almost surely, 2^245623617 is an apocalyptic number.

245623617 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

245623617 is a deficient number, since it is larger than the sum of its proper divisors (121870143).

245623617 is a wasteful number, since it uses less digits than its factorization.

245623617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90181 (or 90175 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 245623617 is about 15672.3838965232. The cubic root of 245623617 is about 626.2629327890.

The spelling of 245623617 in words is "two hundred forty-five million, six hundred twenty-three thousand, six hundred seventeen".