77561134 has 16 divisors (see below), whose sum is σ = 135143136. Its totient is φ = 32695200.

The previous prime is 77561131. The next prime is 77561147. The reversal of 77561134 is 43116577.

It is a self number, because there is not a number n which added to its sum of digits gives 77561134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77561131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44557 + ... + 46264.

It is an arithmetic number, because the mean of its divisors is an integer number (8446446).

Almost surely, 2^77561134 is an apocalyptic number.

77561134 is a deficient number, since it is larger than the sum of its proper divisors (57582002).

77561134 is a wasteful number, since it uses less digits than its factorization.

77561134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90891.

The product of its digits is 17640, while the sum is 34.

The square root of 77561134 is about 8806.8799242410. The cubic root of 77561134 is about 426.4630252435.

The spelling of 77561134 in words is "seventy-seven million, five hundred sixty-one thousand, one hundred thirty-four".