251363514461 has 8 divisors (see below), whose sum is σ = 257278912704. Its totient is φ = 245451286080.

The previous prime is 251363514379. The next prime is 251363514491. The reversal of 251363514461 is 164415363152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 251363514461 - 2³⁰ = 250289772637 is a prime.

It is a super-2 number, since 2×251363514461² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251363514491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631625 + ... + 949566.

It is an arithmetic number, because the mean of its divisors is an integer number (32159864088).

Almost surely, 2^251363514461 is an apocalyptic number.

It is an amenable number.

251363514461 is a deficient number, since it is larger than the sum of its proper divisors (5915398243).

251363514461 is a wasteful number, since it uses less digits than its factorization.

251363514461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584931.

The product of its digits is 259200, while the sum is 41.

The spelling of 251363514461 in words is "two hundred fifty-one billion, three hundred sixty-three million, five hundred fourteen thousand, four hundred sixty-one".