245362648581 has 20 divisors (see below), whose sum is σ = 372741758400. Its totient is φ = 160802636616.

The previous prime is 245362648567. The next prime is 245362648603. The reversal of 245362648581 is 185846263542.

245362648581 is a `hidden beast` number, since 2 + 4 + 5 + 3 + 626 + 4 + 8 + 5 + 8 + 1 = 666.

It is not a de Polignac number, because 245362648581 - 2⁵ = 245362648549 is a prime.

It is a super-2 number, since 2×245362648581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245362648511) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25666141 + ... + 25675698.

It is an arithmetic number, because the mean of its divisors is an integer number (18637087920).

Almost surely, 2^245362648581 is an apocalyptic number.

It is an amenable number.

245362648581 is a deficient number, since it is larger than the sum of its proper divisors (127379109819).

245362648581 is an equidigital number, since it uses as much as digits as its factorization.

245362648581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51341910 (or 51341901 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 54.

The spelling of 245362648581 in words is "two hundred forty-five billion, three hundred sixty-two million, six hundred forty-eight thousand, five hundred eighty-one".