77161842 has 16 divisors (see below), whose sum is σ = 171470880. Its totient is φ = 25720596.

The previous prime is 77161841. The next prime is 77161853. The reversal of 77161842 is 24816177.

It is a junction number, because it is equal to n+sod(n) for n = 77161797 and 77161806.

It is not an unprimeable number, because it can be changed into a prime (77161841) 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 7 ways as a sum of consecutive naturals, for example, 714408 + ... + 714515.

It is an arithmetic number, because the mean of its divisors is an integer number (10716930).

Almost surely, 2^77161842 is an apocalyptic number.

77161842 is an abundant number, since it is smaller than the sum of its proper divisors (94309038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77161842 is a wasteful number, since it uses less digits than its factorization.

77161842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428934 (or 1428928 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 77161842 is about 8784.1813505870. The cubic root of 77161842 is about 425.7299419086.

The spelling of 77161842 in words is "seventy-seven million, one hundred sixty-one thousand, eight hundred forty-two".