2545012454440 has 32 divisors (see below), whose sum is σ = 5731930905480. Its totient is φ = 1017000024832.

The previous prime is 2545012454431. The next prime is 2545012454477. The reversal of 2545012454440 is 444542105452.

It can be written as a sum of positive squares in 4 ways, for example, as 555349867524 + 1989662586916 = 745218^2 + 1410554^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2545012454393 and 2545012454402.

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, 31363879 + ... + 31444918.

Almost surely, 2^{2545012454440} is an apocalyptic number.

2545012454440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2545012454440 is an abundant number, since it is smaller than the sum of its proper divisors (3186918451040).

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

2545012454440 is a wasteful number, since it uses less digits than its factorization.

2545012454440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62809821 (or 62809817 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 40.

Adding to 2545012454440 its reverse (444542105452), we get a palindrome (2989554559892).

The spelling of 2545012454440 in words is "two trillion, five hundred forty-five billion, twelve million, four hundred fifty-four thousand, four hundred forty".