77161916 has 12 divisors (see below), whose sum is σ = 145420632. Its totient is φ = 35613168.

The previous prime is 77161913. The next prime is 77161919. The reversal of 77161916 is 61916177.

It is an interprime number because it is at equal distance from previous prime (77161913) and next prime (77161919).

It is a super-2 number, since 2×77161916² = 11907922561582112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77161916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77161913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 741890 + ... + 741993.

It is an arithmetic number, because the mean of its divisors is an integer number (12118386).

Almost surely, 2^77161916 is an apocalyptic number.

It is an amenable number.

77161916 is a deficient number, since it is larger than the sum of its proper divisors (68258716).

77161916 is a wasteful number, since it uses less digits than its factorization.

77161916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483900 (or 1483898 counting only the distinct ones).

The product of its digits is 15876, while the sum is 38.

The square root of 77161916 is about 8784.1855627030. The cubic root of 77161916 is about 425.7300780035.

The spelling of 77161916 in words is "seventy-seven million, one hundred sixty-one thousand, nine hundred sixteen".