77909296381 has 16 divisors (see below), whose sum is σ = 91228773888. Its totient is φ = 65137852800.

The previous prime is 77909296279. The next prime is 77909296393. The reversal of 77909296381 is 18369290977.

It is a cyclic number.

It is not a de Polignac number, because 77909296381 - 2²⁹ = 77372425469 is a prime.

It is a super-2 number, since 2×77909296381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77909296781) 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, 1615291 + ... + 1662823.

It is an arithmetic number, because the mean of its divisors is an integer number (5701798368).

Almost surely, 2^77909296381 is an apocalyptic number.

It is an amenable number.

77909296381 is a deficient number, since it is larger than the sum of its proper divisors (13319477507).

77909296381 is a wasteful number, since it uses less digits than its factorization.

77909296381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53292.

The product of its (nonzero) digits is 10287648, while the sum is 61.

The spelling of 77909296381 in words is "seventy-seven billion, nine hundred nine million, two hundred ninety-six thousand, three hundred eighty-one".