77122516 has 6 divisors (see below), whose sum is σ = 134964410. Its totient is φ = 38561256.

The previous prime is 77122459. The next prime is 77122531. The reversal of 77122516 is 61522177.

It can be written as a sum of positive squares in only one way, i.e., 76632516 + 490000 = 8754^2 + 700^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9640311 + ... + 9640318.

Almost surely, 2^77122516 is an apocalyptic number.

It is an amenable number.

77122516 is a deficient number, since it is larger than the sum of its proper divisors (57841894).

77122516 is a wasteful number, since it uses less digits than its factorization.

77122516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19280633 (or 19280631 counting only the distinct ones).

The product of its digits is 5880, while the sum is 31.

The square root of 77122516 is about 8781.9426096963. The cubic root of 77122516 is about 425.6576043372.

The spelling of 77122516 in words is "seventy-seven million, one hundred twenty-two thousand, five hundred sixteen".