2553437640 has 64 divisors (see below), whose sum is σ = 8249572800. Its totient is φ = 628538112.

The previous prime is 2553437629. The next prime is 2553437651. The reversal of 2553437640 is 467343552.

It is an interprime number because it is at equal distance from previous prime (2553437629) and next prime (2553437651).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 816850 + ... + 819969.

It is an arithmetic number, because the mean of its divisors is an integer number (128899575).

Almost surely, 2^2553437640 is an apocalyptic number.

2553437640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2553437640 is an abundant number, since it is smaller than the sum of its proper divisors (5696135160).

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

2553437640 is a wasteful number, since it uses less digits than its factorization.

2553437640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636846 (or 1636842 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 39.

The square root of 2553437640 is about 50531.5509360241. The cubic root of 2553437640 is about 1366.8108531859.

The spelling of 2553437640 in words is "two billion, five hundred fifty-three million, four hundred thirty-seven thousand, six hundred forty".