7780061016 has 576 divisors, whose sum is σ = 28776384000. Its totient is φ = 1921480704.

The previous prime is 7780060991. The next prime is 7780061017. The reversal of 7780061016 is 6101600877.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7780061017) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 39095685 + ... + 39095883.

It is an arithmetic number, because the mean of its divisors is an integer number (49959000).

Almost surely, 2^7780061016 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 7780061016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14388192000).

7780061016 is an abundant number, since it is smaller than the sum of its proper divisors (20996322984).

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

7780061016 is a wasteful number, since it uses less digits than its factorization.

7780061016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 7780061016 is about 88204.6541629182. The cubic root of 7780061016 is about 1981.5011756164.

The spelling of 7780061016 in words is "seven billion, seven hundred eighty million, sixty-one thousand, sixteen".