505236651457 has 4 divisors (see below), whose sum is σ = 505345990996. Its totient is φ = 505127311920.

The previous prime is 505236651401. The next prime is 505236651461. The reversal of 505236651457 is 754156632505.

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

It can be written as a sum of positive squares in 2 ways, for example, as 135042285361 + 370194366096 = 367481^2 + 608436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505236651457 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 505236651457.

It is not an unprimeable number, because it can be changed into a prime (505236651497) 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, 54662838 + ... + 54672079.

It is an arithmetic number, because the mean of its divisors is an integer number (126336497749).

Almost surely, 2^505236651457 is an apocalyptic number.

It is an amenable number.

505236651457 is a deficient number, since it is larger than the sum of its proper divisors (109339539).

505236651457 is a wasteful number, since it uses less digits than its factorization.

505236651457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109339538.

The product of its (nonzero) digits is 3780000, while the sum is 49.

The spelling of 505236651457 in words is "five hundred five billion, two hundred thirty-six million, six hundred fifty-one thousand, four hundred fifty-seven".