251631120662 has 4 divisors (see below), whose sum is σ = 377446680996. Its totient is φ = 125815560330.

The previous prime is 251631120647. The next prime is 251631120677. The reversal of 251631120662 is 266021136152.

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

It is an interprime number because it is at equal distance from previous prime (251631120647) and next prime (251631120677).

It is a super-2 number, since 2×251631120662² (a number of 24 digits) contains 22 as substring.

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, 62907780164 + ... + 62907780167.

It is an arithmetic number, because the mean of its divisors is an integer number (94361670249).

Almost surely, 2^251631120662 is an apocalyptic number.

251631120662 is a deficient number, since it is larger than the sum of its proper divisors (125815560334).

251631120662 is a wasteful number, since it uses less digits than its factorization.

251631120662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125815560333.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 251631120662 in words is "two hundred fifty-one billion, six hundred thirty-one million, one hundred twenty thousand, six hundred sixty-two".