76438266977 has 4 divisors (see below), whose sum is σ = 80461333680. Its totient is φ = 72415200276.

The previous prime is 76438266943. The next prime is 76438266979. The reversal of 76438266977 is 77966283467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77966283467 = 191 ⋅408200437.

It is a cyclic number.

It is not a de Polignac number, because 76438266977 - 2⁶ = 76438266913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76438266979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011533323 + ... + 2011533360.

It is an arithmetic number, because the mean of its divisors is an integer number (20115333420).

Almost surely, 2^76438266977 is an apocalyptic number.

It is an amenable number.

76438266977 is a deficient number, since it is larger than the sum of its proper divisors (4023066703).

76438266977 is a wasteful number, since it uses less digits than its factorization.

76438266977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023066702.

The product of its digits is 128024064, while the sum is 65.

The spelling of 76438266977 in words is "seventy-six billion, four hundred thirty-eight million, two hundred sixty-six thousand, nine hundred seventy-seven".