2545245440 has 72 divisors (see below), whose sum is σ = 6455340360. Its totient is φ = 958201856.

The previous prime is 2545245433. The next prime is 2545245499. The reversal of 2545245440 is 445425452.

It can be written as a sum of positive squares in 4 ways, for example, as 1192182784 + 1353062656 = 34528^2 + 36784^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2545245440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36725 + ... + 80244.

It is an arithmetic number, because the mean of its divisors is an integer number (89657505).

Almost surely, 2^2545245440 is an apocalyptic number.

2545245440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2545245440 is an abundant number, since it is smaller than the sum of its proper divisors (3910094920).

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

2545245440 is a wasteful number, since it uses less digits than its factorization.

2545245440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117007 (or 116993 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 35.

The square root of 2545245440 is about 50450.4255680762. The cubic root of 2545245440 is about 1365.3475730259.

The spelling of 2545245440 in words is "two billion, five hundred forty-five million, two hundred forty-five thousand, four hundred forty".