77642036 has 6 divisors (see below), whose sum is σ = 135873570. Its totient is φ = 38821016.

The previous prime is 77642027. The next prime is 77642041. The reversal of 77642036 is 63024677.

It can be written as a sum of positive squares in only one way, i.e., 72352036 + 5290000 = 8506^2 + 2300^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77641987 and 77642005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9705251 + ... + 9705258.

It is an arithmetic number, because the mean of its divisors is an integer number (22645595).

Almost surely, 2^77642036 is an apocalyptic number.

It is an amenable number.

77642036 is a deficient number, since it is larger than the sum of its proper divisors (58231534).

77642036 is a wasteful number, since it uses less digits than its factorization.

77642036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19410513 (or 19410511 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 77642036 is about 8811.4718407313. The cubic root of 77642036 is about 426.6112512122.

The spelling of 77642036 in words is "seventy-seven million, six hundred forty-two thousand, thirty-six".