77771257060 has 48 divisors (see below), whose sum is σ = 186669705600. Its totient is φ = 26661761280.

The previous prime is 77771257043. The next prime is 77771257087. The reversal of 77771257060 is 6075217777.

It is a junction number, because it is equal to n+sod(n) for n = 77771256995 and 77771257013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1805575 + ... + 1848145.

It is an arithmetic number, because the mean of its divisors is an integer number (3888952200).

Almost surely, 2^77771257060 is an apocalyptic number.

77771257060 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77771257060 is an abundant number, since it is smaller than the sum of its proper divisors (108898448540).

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

77771257060 is a wasteful number, since it uses less digits than its factorization.

77771257060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55636 (or 55634 counting only the distinct ones).

The product of its (nonzero) digits is 1008420, while the sum is 49.

The spelling of 77771257060 in words is "seventy-seven billion, seven hundred seventy-one million, two hundred fifty-seven thousand, sixty".