77378380955 has 16 divisors (see below), whose sum is σ = 95982796800. Its totient is φ = 59822438880.

The previous prime is 77378380909. The next prime is 77378380967. The reversal of 77378380955 is 55908387377.

It is not a de Polignac number, because 77378380955 - 2¹⁴ = 77378364571 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235715 + ... + 458604.

It is an arithmetic number, because the mean of its divisors is an integer number (5998924800).

Almost surely, 2^77378380955 is an apocalyptic number.

77378380955 is a deficient number, since it is larger than the sum of its proper divisors (18604415845).

77378380955 is a wasteful number, since it uses less digits than its factorization.

77378380955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695074.

The product of its (nonzero) digits is 44452800, while the sum is 62.

The spelling of 77378380955 in words is "seventy-seven billion, three hundred seventy-eight million, three hundred eighty thousand, nine hundred fifty-five".