516154645 has 4 divisors (see below), whose sum is σ = 619385580. Its totient is φ = 412923712.

The previous prime is 516154591. The next prime is 516154649. The reversal of 516154645 is 546451615.

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 409941009 + 106213636 = 20247^2 + 10306^2 .

It is a cyclic number.

It is not a de Polignac number, because 516154645 - 2¹³ = 516146453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516154649) 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, 51615460 + ... + 51615469.

It is an arithmetic number, because the mean of its divisors is an integer number (154846395).

Almost surely, 2^516154645 is an apocalyptic number.

It is an amenable number.

516154645 is a deficient number, since it is larger than the sum of its proper divisors (103230935).

516154645 is a wasteful number, since it uses less digits than its factorization.

516154645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103230934.

The product of its digits is 72000, while the sum is 37.

The square root of 516154645 is about 22719.0370614602. The cubic root of 516154645 is about 802.1580508900.

The spelling of 516154645 in words is "five hundred sixteen million, one hundred fifty-four thousand, six hundred forty-five".