2561401454 has 4 divisors (see below), whose sum is σ = 3842102184. Its totient is φ = 1280700726.

The previous prime is 2561401379. The next prime is 2561401471. The reversal of 2561401454 is 4541041652.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2561401454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640350362 + ... + 640350365.

It is an arithmetic number, because the mean of its divisors is an integer number (960525546).

Almost surely, 2^2561401454 is an apocalyptic number.

2561401454 is a deficient number, since it is larger than the sum of its proper divisors (1280700730).

2561401454 is a wasteful number, since it uses less digits than its factorization.

2561401454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280700729.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 2561401454 is about 50610.2900011450. The cubic root of 2561401454 is about 1368.2303422847.

The spelling of 2561401454 in words is "two billion, five hundred sixty-one million, four hundred one thousand, four hundred fifty-four".