7720848261 has 16 divisors (see below), whose sum is σ = 13072336000. Its totient is φ = 4411913184.

The previous prime is 7720848257. The next prime is 7720848307. The reversal of 7720848261 is 1628480277.

It is not a de Polignac number, because 7720848261 - 2² = 7720848257 is a prime.

It is a super-2 number, since 2×7720848261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720848241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20425336 + ... + 20425713.

It is an arithmetic number, because the mean of its divisors is an integer number (817021000).

Almost surely, 2^7720848261 is an apocalyptic number.

It is an amenable number.

7720848261 is a deficient number, since it is larger than the sum of its proper divisors (5351487739).

7720848261 is a wasteful number, since it uses less digits than its factorization.

7720848261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40851065 (or 40851059 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 7720848261 is about 87868.3575640287. The cubic root of 7720848261 is about 1976.4614092831.

The spelling of 7720848261 in words is "seven billion, seven hundred twenty million, eight hundred forty-eight thousand, two hundred sixty-one".