2507661400 has 24 divisors (see below), whose sum is σ = 5830313220. Its totient is φ = 1003064480.

The previous prime is 2507661397. The next prime is 2507661413. The reversal of 2507661400 is 41667052.

It is a happy number.

2507661400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6268954 + ... + 6269353.

Almost surely, 2^2507661400 is an apocalyptic number.

2507661400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2507661400 is an abundant number, since it is smaller than the sum of its proper divisors (3322651820).

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

2507661400 is a wasteful number, since it uses less digits than its factorization.

2507661400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12538323 (or 12538314 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2507661400 is about 50076.5553927185. Note that the first 3 decimals coincide. The cubic root of 2507661400 is about 1358.5938103940.

The spelling of 2507661400 in words is "two billion, five hundred seven million, six hundred sixty-one thousand, four hundred".