77654642 has 16 divisors (see below), whose sum is σ = 126087192. Its totient is φ = 35656320.

The previous prime is 77654641. The next prime is 77654701. The reversal of 77654642 is 24645677.

It can be written as a sum of positive squares in 4 ways, for example, as 73290721 + 4363921 = 8561^2 + 2089^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77654642.

It is not an unprimeable number, because it can be changed into a prime (77654641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2459 + ... + 12702.

Almost surely, 2^77654642 is an apocalyptic number.

77654642 is a deficient number, since it is larger than the sum of its proper divisors (48432550).

77654642 is a wasteful number, since it uses less digits than its factorization.

77654642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15373.

The product of its digits is 282240, while the sum is 41.

The square root of 77654642 is about 8812.1871291978. The cubic root of 77654642 is about 426.6343382352.

The spelling of 77654642 in words is "seventy-seven million, six hundred fifty-four thousand, six hundred forty-two".