245618643 has 16 divisors (see below), whose sum is σ = 345324800. Its totient is φ = 154859040.

The previous prime is 245618599. The next prime is 245618651. The reversal of 245618643 is 346816542.

It is not a de Polignac number, because 245618643 - 2²¹ = 243521491 is a prime.

It is a super-2 number, since 2×245618643² = 120657035578322898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245618693) 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, 32553 + ... + 39381.

It is an arithmetic number, because the mean of its divisors is an integer number (21582800).

Almost surely, 2^245618643 is an apocalyptic number.

245618643 is a deficient number, since it is larger than the sum of its proper divisors (99706157).

245618643 is a wasteful number, since it uses less digits than its factorization.

245618643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7482.

The product of its digits is 138240, while the sum is 39.

The square root of 245618643 is about 15672.2252089485. The cubic root of 245618643 is about 626.2587053822.

The spelling of 245618643 in words is "two hundred forty-five million, six hundred eighteen thousand, six hundred forty-three".