77161244 has 6 divisors (see below), whose sum is σ = 135032184. Its totient is φ = 38580620.

The previous prime is 77161241. The next prime is 77161313. The reversal of 77161244 is 44216177.

It is a self number, because there is not a number n which added to its sum of digits gives 77161244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77161241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9645152 + ... + 9645159.

It is an arithmetic number, because the mean of its divisors is an integer number (22505364).

Almost surely, 2^77161244 is an apocalyptic number.

It is an amenable number.

77161244 is a deficient number, since it is larger than the sum of its proper divisors (57870940).

77161244 is a wasteful number, since it uses less digits than its factorization.

77161244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19290315 (or 19290313 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 77161244 is about 8784.1473120617. The cubic root of 77161244 is about 425.7288421112.

The spelling of 77161244 in words is "seventy-seven million, one hundred sixty-one thousand, two hundred forty-four".