77452381850 has 24 divisors (see below), whose sum is σ = 151643612640. Its totient is φ = 29350375920.

The previous prime is 77452381847. The next prime is 77452381859. The reversal of 77452381850 is 5818325477.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77452381859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40763462 + ... + 40765361.

It is an arithmetic number, because the mean of its divisors is an integer number (6318483860).

Almost surely, 2^77452381850 is an apocalyptic number.

77452381850 is a deficient number, since it is larger than the sum of its proper divisors (74191230790).

77452381850 is a wasteful number, since it uses less digits than its factorization.

77452381850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81528854 (or 81528849 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 50.

The spelling of 77452381850 in words is "seventy-seven billion, four hundred fifty-two million, three hundred eighty-one thousand, eight hundred fifty".