2545257406 has 4 divisors (see below), whose sum is σ = 3817886112. Its totient is φ = 1272628702.

The previous prime is 2545257397. The next prime is 2545257437. The reversal of 2545257406 is 6047525452.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636314350 + ... + 636314353.

It is an arithmetic number, because the mean of its divisors is an integer number (954471528).

Almost surely, 2^2545257406 is an apocalyptic number.

2545257406 is a deficient number, since it is larger than the sum of its proper divisors (1272628706).

2545257406 is a wasteful number, since it uses less digits than its factorization.

2545257406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272628705.

The product of its (nonzero) digits is 336000, while the sum is 40.

The square root of 2545257406 is about 50450.5441596025. The cubic root of 2545257406 is about 1365.3497126654.

The spelling of 2545257406 in words is "two billion, five hundred forty-five million, two hundred fifty-seven thousand, four hundred six".