77770000776 has 128 divisors (see below), whose sum is σ = 222814368000. Its totient is φ = 22408151040.

The previous prime is 77770000771. The next prime is 77770000783. The reversal of 77770000776 is 67700007777.

It is not an unprimeable number, because it can be changed into a prime (77770000771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1018656 + ... + 1092336.

It is an arithmetic number, because the mean of its divisors is an integer number (1740737250).

Almost surely, 2^77770000776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77770000776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111407184000).

77770000776 is an abundant number, since it is smaller than the sum of its proper divisors (145044367224).

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

77770000776 is a wasteful number, since it uses less digits than its factorization.

77770000776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73919 (or 73915 counting only the distinct ones).

The product of its (nonzero) digits is 705894, while the sum is 48.

The spelling of 77770000776 in words is "seventy-seven billion, seven hundred seventy million, seven hundred seventy-six", and thus it is an aban number.