77705251206 has 16 divisors (see below), whose sum is σ = 169538730048. Its totient is φ = 23547045800.

The previous prime is 77705251201. The next prime is 77705251219. The reversal of 77705251206 is 60215250777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77705251201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588676080 + ... + 588676211.

It is an arithmetic number, because the mean of its divisors is an integer number (10596170628).

Almost surely, 2^77705251206 is an apocalyptic number.

77705251206 is an abundant number, since it is smaller than the sum of its proper divisors (91833478842).

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

77705251206 is a wasteful number, since it uses less digits than its factorization.

77705251206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177352307.

The product of its (nonzero) digits is 205800, while the sum is 42.

The spelling of 77705251206 in words is "seventy-seven billion, seven hundred five million, two hundred fifty-one thousand, two hundred six".