77746155176642 has 16 divisors (see below), whose sum is σ = 117248203095552. Its totient is φ = 38663484695280.

The previous prime is 77746155176633. The next prime is 77746155176693. The reversal of 77746155176642 is 24667155164777.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13533188 + ... + 18402159.

It is an arithmetic number, because the mean of its divisors is an integer number (7328012693472).

Almost surely, 2^{77746155176642} is an apocalyptic number.

77746155176642 is a deficient number, since it is larger than the sum of its proper divisors (39502047918910).

77746155176642 is a wasteful number, since it uses less digits than its factorization.

77746155176642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31941913.

The product of its digits is 414892800, while the sum is 68.

The spelling of 77746155176642 in words is "seventy-seven trillion, seven hundred forty-six billion, one hundred fifty-five million, one hundred seventy-six thousand, six hundred forty-two".