612747557811 has 16 divisors (see below), whose sum is σ = 910516693120. Its totient is φ = 407264231880.

The previous prime is 612747557783. The next prime is 612747557819. The reversal of 612747557811 is 118755747216.

It is a happy number.

612747557811 is a `hidden beast` number, since 6 + 1 + 2 + 7 + 4 + 7 + 557 + 81 + 1 = 666.

It is not a de Polignac number, because 612747557811 - 2¹⁰ = 612747556787 is a prime.

It is a super-2 number, since 2×612747557811² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612747557819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34272565 + ... + 34290438.

It is an arithmetic number, because the mean of its divisors is an integer number (56907293320).

Almost surely, 2^612747557811 is an apocalyptic number.

612747557811 is a deficient number, since it is larger than the sum of its proper divisors (297769135309).

612747557811 is a wasteful number, since it uses less digits than its factorization.

612747557811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68563343 (or 68563337 counting only the distinct ones).

The product of its digits is 3292800, while the sum is 54.

The spelling of 612747557811 in words is "six hundred twelve billion, seven hundred forty-seven million, five hundred fifty-seven thousand, eight hundred eleven".