77761378381375 has 32 divisors (see below), whose sum is σ = 104584431631680. Its totient is φ = 57383600803200.

The previous prime is 77761378381367. The next prime is 77761378381381. The reversal of 77761378381375 is 57318387316777.

It is not a de Polignac number, because 77761378381375 - 2³ = 77761378381367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77761378381298 and 77761378381307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14421457 + ... + 19065706.

It is an arithmetic number, because the mean of its divisors is an integer number (3268263488490).

Almost surely, 2^{77761378381375} is an apocalyptic number.

77761378381375 is a deficient number, since it is larger than the sum of its proper divisors (26823053250305).

77761378381375 is a wasteful number, since it uses less digits than its factorization.

77761378381375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33488620 (or 33488610 counting only the distinct ones).

The product of its digits is 871274880, while the sum is 73.

The spelling of 77761378381375 in words is "seventy-seven trillion, seven hundred sixty-one billion, three hundred seventy-eight million, three hundred eighty-one thousand, three hundred seventy-five".