77261391011 has 16 divisors (see below), whose sum is σ = 92897031360. Its totient is φ = 62862635520.

The previous prime is 77261390993. The next prime is 77261391029. The reversal of 77261391011 is 11019316277.

It is an interprime number because it is at equal distance from previous prime (77261390993) and next prime (77261391029).

It is a cyclic number.

It is not a de Polignac number, because 77261391011 - 2²² = 77257196707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77261391211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3627266 + ... + 3648503.

It is an arithmetic number, because the mean of its divisors is an integer number (5806064460).

Almost surely, 2^77261391011 is an apocalyptic number.

77261391011 is a deficient number, since it is larger than the sum of its proper divisors (15635640349).

77261391011 is a wasteful number, since it uses less digits than its factorization.

77261391011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7275854.

The product of its (nonzero) digits is 15876, while the sum is 38.

The spelling of 77261391011 in words is "seventy-seven billion, two hundred sixty-one million, three hundred ninety-one thousand, eleven".