2511553540 has 48 divisors (see below), whose sum is σ = 5510397312. Its totient is φ = 959751936.

The previous prime is 2511553519. The next prime is 2511553547. The reversal of 2511553540 is 453551152.

It is not an unprimeable number, because it can be changed into a prime (2511553547) 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, 428107 + ... + 433933.

It is an arithmetic number, because the mean of its divisors is an integer number (114799944).

Almost surely, 2^2511553540 is an apocalyptic number.

2511553540 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 2511553540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2755198656).

2511553540 is an abundant number, since it is smaller than the sum of its proper divisors (2998843772).

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

2511553540 is a wasteful number, since it uses less digits than its factorization.

2511553540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6796 (or 6794 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 2511553540 is about 50115.4022232686. The cubic root of 2511553540 is about 1359.2963379787.

The spelling of 2511553540 in words is "two billion, five hundred eleven million, five hundred fifty-three thousand, five hundred forty".