251545064145 has 8 divisors (see below), whose sum is σ = 402472102656. Its totient is φ = 134157367536.

The previous prime is 251545064131. The next prime is 251545064171. The reversal of 251545064145 is 541460545152.

It is a happy number.

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

It is not a de Polignac number, because 251545064145 - 2¹³ = 251545055953 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 251545064097 and 251545064106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8384835457 + ... + 8384835486.

It is an arithmetic number, because the mean of its divisors is an integer number (50309012832).

Almost surely, 2^251545064145 is an apocalyptic number.

It is an amenable number.

251545064145 is a deficient number, since it is larger than the sum of its proper divisors (150927038511).

251545064145 is a wasteful number, since it uses less digits than its factorization.

251545064145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16769670951.

The product of its (nonzero) digits is 480000, while the sum is 42.

The spelling of 251545064145 in words is "two hundred fifty-one billion, five hundred forty-five million, sixty-four thousand, one hundred forty-five".