506161560006251 has 4 divisors (see below), whose sum is σ = 506312788441032. Its totient is φ = 506010331571472.

The previous prime is 506161560006241. The next prime is 506161560006257. The reversal of 506161560006251 is 152600065161605.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 506161560006251 - 2¹⁴ = 506161559989867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506161560006257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75614212370 + ... + 75614219063.

It is an arithmetic number, because the mean of its divisors is an integer number (126578197110258).

Almost surely, 2^{506161560006251} is an apocalyptic number.

506161560006251 is a deficient number, since it is larger than the sum of its proper divisors (151228434781).

506161560006251 is a wasteful number, since it uses less digits than its factorization.

506161560006251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151228434780.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 506161560006251 in words is "five hundred six trillion, one hundred sixty-one billion, five hundred sixty million, six thousand, two hundred fifty-one".