510642036561 has 4 divisors (see below), whose sum is σ = 680856048752. Its totient is φ = 340428024372.

The previous prime is 510642036539. The next prime is 510642036563. The reversal of 510642036561 is 165630246015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 510642036561 - 2²¹ = 510639939409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (510642036563) 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, 85107006091 + ... + 85107006096.

It is an arithmetic number, because the mean of its divisors is an integer number (170214012188).

Almost surely, 2^510642036561 is an apocalyptic number.

It is an amenable number.

510642036561 is a deficient number, since it is larger than the sum of its proper divisors (170214012191).

510642036561 is a wasteful number, since it uses less digits than its factorization.

510642036561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170214012190.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 510642036561 in words is "five hundred ten billion, six hundred forty-two million, thirty-six thousand, five hundred sixty-one".