251280081379 has 4 divisors (see below), whose sum is σ = 264505348840. Its totient is φ = 238054813920.

The previous prime is 251280081361. The next prime is 251280081401. The reversal of 251280081379 is 973180082152.

It is a happy number.

251280081379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 251280081379 - 2⁵ = 251280081347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251280081359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6612633702 + ... + 6612633739.

It is an arithmetic number, because the mean of its divisors is an integer number (66126337210).

Almost surely, 2^251280081379 is an apocalyptic number.

251280081379 is a deficient number, since it is larger than the sum of its proper divisors (13225267461).

251280081379 is a wasteful number, since it uses less digits than its factorization.

251280081379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13225267460.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 251280081379 in words is "two hundred fifty-one billion, two hundred eighty million, eighty-one thousand, three hundred seventy-nine".