77685863106 has 128 divisors (see below), whose sum is σ = 168543866880. Its totient is φ = 23812588800.

The previous prime is 77685863093. The next prime is 77685863107. The reversal of 77685863106 is 60136858677.

It is not an unprimeable number, because it can be changed into a prime (77685863107) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 109570680 + ... + 109571388.

It is an arithmetic number, because the mean of its divisors is an integer number (1316748960).

Almost surely, 2^77685863106 is an apocalyptic number.

77685863106 is an abundant number, since it is smaller than the sum of its proper divisors (90858003774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77685863106 is a wasteful number, since it uses less digits than its factorization.

77685863106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072.

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 77685863106 in words is "seventy-seven billion, six hundred eighty-five million, eight hundred sixty-three thousand, one hundred six".