77775252651 has 16 divisors (see below), whose sum is σ = 116681113600. Its totient is φ = 51193835784.

The previous prime is 77775252647. The next prime is 77775252661. The reversal of 77775252651 is 15625257777.

It is not a de Polignac number, because 77775252651 - 2² = 77775252647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77775252661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18229291 + ... + 18233556.

It is an arithmetic number, because the mean of its divisors is an integer number (7292569600).

Almost surely, 2^77775252651 is an apocalyptic number.

77775252651 is a deficient number, since it is larger than the sum of its proper divisors (38905860949).

77775252651 is a wasteful number, since it uses less digits than its factorization.

77775252651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36462935 (or 36462929 counting only the distinct ones).

The product of its digits is 7203000, while the sum is 54.

The spelling of 77775252651 in words is "seventy-seven billion, seven hundred seventy-five million, two hundred fifty-two thousand, six hundred fifty-one".