7776780088 has 64 divisors (see below), whose sum is σ = 18487699200. Its totient is φ = 2978545920.

The previous prime is 7776780059. The next prime is 7776780091. The reversal of 7776780088 is 8800876777.

It is a super-2 number, since 2×7776780088² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70645 + ... + 143332.

It is an arithmetic number, because the mean of its divisors is an integer number (288870300).

Almost surely, 2^7776780088 is an apocalyptic number.

It is an amenable number.

7776780088 is an abundant number, since it is smaller than the sum of its proper divisors (10710919112).

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

7776780088 is a wasteful number, since it uses less digits than its factorization.

7776780088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214060 (or 214056 counting only the distinct ones).

The product of its (nonzero) digits is 7375872, while the sum is 58.

The square root of 7776780088 is about 88186.0538180499. The cubic root of 7776780088 is about 1981.2225969627. Note that the first 3 decimals are identical.

The spelling of 7776780088 in words is "seven billion, seven hundred seventy-six million, seven hundred eighty thousand, eighty-eight".