251611401314161 has 8 divisors (see below), whose sum is σ = 287589634014464. Its totient is φ = 215641605313440.

The previous prime is 251611401314153. The next prime is 251611401314173. The reversal of 251611401314161 is 161413104116152.

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 251611401314161 - 2³ = 251611401314153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 251611401314161.

It is not an unprimeable number, because it can be changed into a prime (251611401314101) 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, 2109110985 + ... + 2109230278.

It is an arithmetic number, because the mean of its divisors is an integer number (35948704251808).

Almost surely, 2^{251611401314161} is an apocalyptic number.

It is an amenable number.

251611401314161 is a deficient number, since it is larger than the sum of its proper divisors (35978232700303).

251611401314161 is an equidigital number, since it uses as much as digits as its factorization.

251611401314161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218349791.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 251611401314161 in words is "two hundred fifty-one trillion, six hundred eleven billion, four hundred one million, three hundred fourteen thousand, one hundred sixty-one".