77121330074216 has 32 divisors (see below), whose sum is σ = 145010021307840. Its totient is φ = 38452142529408.

The previous prime is 77121330074171. The next prime is 77121330074227. The reversal of 77121330074216 is 61247003312177.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5392685 + ... + 13539708.

It is an arithmetic number, because the mean of its divisors is an integer number (4531563165870).

Almost surely, 2^{77121330074216} is an apocalyptic number.

It is an amenable number.

77121330074216 is a deficient number, since it is larger than the sum of its proper divisors (67888691233624).

77121330074216 is a wasteful number, since it uses less digits than its factorization.

77121330074216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18933833 (or 18933829 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 44.

The spelling of 77121330074216 in words is "seventy-seven trillion, one hundred twenty-one billion, three hundred thirty million, seventy-four thousand, two hundred sixteen".