77381685250 has 32 divisors (see below), whose sum is σ = 145082710656. Its totient is φ = 30904769200.

The previous prime is 77381685247. The next prime is 77381685253. The reversal of 77381685250 is 5258618377.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77381685247) and next prime (77381685253).

It is not an unprimeable number, because it can be changed into a prime (77381685253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77452 + ... + 400951.

It is an arithmetic number, because the mean of its divisors is an integer number (4533834708).

Almost surely, 2^77381685250 is an apocalyptic number.

77381685250 is a deficient number, since it is larger than the sum of its proper divisors (67701025406).

77381685250 is a wasteful number, since it uses less digits than its factorization.

77381685250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479067 (or 479057 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 77381685250 in words is "seventy-seven billion, three hundred eighty-one million, six hundred eighty-five thousand, two hundred fifty".