245651320640 has 56 divisors (see below), whose sum is σ = 638135144352. Its totient is φ = 89327751680.

The previous prime is 245651320627. The next prime is 245651320643. The reversal of 245651320640 is 46023156542.

It is a junction number, because it is equal to n+sod(n) for n = 245651320594 and 245651320603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245651320643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34890134 + ... + 34897173.

Almost surely, 2^245651320640 is an apocalyptic number.

245651320640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245651320640 is an abundant number, since it is smaller than the sum of its proper divisors (392483823712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245651320640 is a wasteful number, since it uses less digits than its factorization.

245651320640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69787335 (or 69787325 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 245651320640 in words is "two hundred forty-five billion, six hundred fifty-one million, three hundred twenty thousand, six hundred forty".