69542112649 has 16 divisors (see below), whose sum is σ = 72609158160. Its totient is φ = 66541296640.

The previous prime is 69542112643. The next prime is 69542112659. The reversal of 69542112649 is 94621124596.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5348289424 + 64193823225 = 73132^2 + 253365^2 .

It is a cyclic number.

It is not a de Polignac number, because 69542112649 - 2⁵ = 69542112617 is a prime.

It is a super-2 number, since 2×69542112649² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69542112643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9159747 + ... + 9167335.

It is an arithmetic number, because the mean of its divisors is an integer number (4538072385).

Almost surely, 2^69542112649 is an apocalyptic number.

It is an amenable number.

69542112649 is a deficient number, since it is larger than the sum of its proper divisors (3067045511).

69542112649 is a wasteful number, since it uses less digits than its factorization.

69542112649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11900.

The product of its digits is 933120, while the sum is 49.

The spelling of 69542112649 in words is "sixty-nine billion, five hundred forty-two million, one hundred twelve thousand, six hundred forty-nine".