251442545304145 has 32 divisors (see below), whose sum is σ = 328025387579904. Its totient is φ = 183926140128000.

The previous prime is 251442545304133. The next prime is 251442545304199. The reversal of 251442545304145 is 541403545244152.

It is not a de Polignac number, because 251442545304145 - 2²¹ = 251442543206993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38207931 + ... + 44302720.

It is an arithmetic number, because the mean of its divisors is an integer number (10250793361872).

Almost surely, 2^{251442545304145} is an apocalyptic number.

It is an amenable number.

251442545304145 is a deficient number, since it is larger than the sum of its proper divisors (76582842275759).

251442545304145 is a wasteful number, since it uses less digits than its factorization.

251442545304145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82511113.

The product of its (nonzero) digits is 7680000, while the sum is 49.

The spelling of 251442545304145 in words is "two hundred fifty-one trillion, four hundred forty-two billion, five hundred forty-five million, three hundred four thousand, one hundred forty-five".