77165226556 has 48 divisors (see below), whose sum is σ = 148432203360. Its totient is φ = 34809937920.

The previous prime is 77165226539. The next prime is 77165226581. The reversal of 77165226556 is 65562256177.

It is a super-2 number, since 2×77165226556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4383340 + ... + 4400908.

It is an arithmetic number, because the mean of its divisors is an integer number (3092337570).

Almost surely, 2^77165226556 is an apocalyptic number.

It is an amenable number.

77165226556 is a deficient number, since it is larger than the sum of its proper divisors (71266976804).

77165226556 is a wasteful number, since it uses less digits than its factorization.

77165226556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18334 (or 18332 counting only the distinct ones).

The product of its digits is 5292000, while the sum is 52.

The spelling of 77165226556 in words is "seventy-seven billion, one hundred sixty-five million, two hundred twenty-six thousand, five hundred fifty-six".