77261121676013 has 4 divisors (see below), whose sum is σ = 84284860010208. Its totient is φ = 70237383341820.

The previous prime is 77261121675989. The next prime is 77261121676031. The reversal of 77261121676013 is 31067612116277.

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.

It is a cyclic number.

It is not a de Polignac number, because 77261121676013 - 2⁸ = 77261121675757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77261121676043) 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, 3511869167081 + ... + 3511869167102.

It is an arithmetic number, because the mean of its divisors is an integer number (21071215002552).

Almost surely, 2^{77261121676013} is an apocalyptic number.

It is an amenable number.

77261121676013 is a deficient number, since it is larger than the sum of its proper divisors (7023738334195).

77261121676013 is a wasteful number, since it uses less digits than its factorization.

77261121676013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7023738334194.

The product of its (nonzero) digits is 889056, while the sum is 50.

The spelling of 77261121676013 in words is "seventy-seven trillion, two hundred sixty-one billion, one hundred twenty-one million, six hundred seventy-six thousand, thirteen".