251342161620344 has 8 divisors (see below), whose sum is σ = 471266553038160. Its totient is φ = 125671080810168.

The previous prime is 251342161620331. The next prime is 251342161620371. The reversal of 251342161620344 is 443026161243152.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 251342161620295 and 251342161620304.

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, 15708885101264 + ... + 15708885101279.

It is an arithmetic number, because the mean of its divisors is an integer number (58908319129770).

Almost surely, 2^{251342161620344} is an apocalyptic number.

It is an amenable number.

251342161620344 is a deficient number, since it is larger than the sum of its proper divisors (219924391417816).

251342161620344 is a wasteful number, since it uses less digits than its factorization.

251342161620344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31417770202549 (or 31417770202545 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 251342161620344 in words is "two hundred fifty-one trillion, three hundred forty-two billion, one hundred sixty-one million, six hundred twenty thousand, three hundred forty-four".