245413131520 has 144 divisors (see below), whose sum is σ = 631713636288. Its totient is φ = 91011317760.

The previous prime is 245413131497. The next prime is 245413131527. The reversal of 245413131520 is 25131314542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245413131527) 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, 1373755 + ... + 1542085.

It is an arithmetic number, because the mean of its divisors is an integer number (4386900252).

Almost surely, 2^245413131520 is an apocalyptic number.

245413131520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245413131520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315856818144).

245413131520 is an abundant number, since it is smaller than the sum of its proper divisors (386300504768).

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

245413131520 is a wasteful number, since it uses less digits than its factorization.

245413131520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168436 (or 168422 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 245413131520 in words is "two hundred forty-five billion, four hundred thirteen million, one hundred thirty-one thousand, five hundred twenty".