77901872767 has 4 divisors (see below), whose sum is σ = 77942597040. Its totient is φ = 77861148496.

The previous prime is 77901872723. The next prime is 77901872813. The reversal of 77901872767 is 76727810977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76727810977 = 37 ⋅2073724621.

It is a cyclic number.

It is not a de Polignac number, because 77901872767 - 2¹⁵ = 77901839999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77901872567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20359267 + ... + 20363092.

It is an arithmetic number, because the mean of its divisors is an integer number (19485649260).

Almost surely, 2^77901872767 is an apocalyptic number.

77901872767 is a deficient number, since it is larger than the sum of its proper divisors (40724273).

77901872767 is a wasteful number, since it uses less digits than its factorization.

77901872767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40724272.

The product of its (nonzero) digits is 14521248, while the sum is 61.

The spelling of 77901872767 in words is "seventy-seven billion, nine hundred one million, eight hundred seventy-two thousand, seven hundred sixty-seven".