2720763261 has 6 divisors (see below), whose sum is σ = 3929991390. Its totient is φ = 1813842168.

The previous prime is 2720763259. The next prime is 2720763277. The reversal of 2720763261 is 1623670272.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1872206361 + 848556900 = 43269^2 + 29130^2 .

It is not a de Polignac number, because 2720763261 - 2¹ = 2720763259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720763211) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 151153506 + ... + 151153523.

It is an arithmetic number, because the mean of its divisors is an integer number (654998565).

Almost surely, 2^2720763261 is an apocalyptic number.

It is an amenable number.

2720763261 is a deficient number, since it is larger than the sum of its proper divisors (1209228129).

2720763261 is a wasteful number, since it uses less digits than its factorization.

2720763261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302307035 (or 302307032 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 2720763261 is about 52160.9361591603. The cubic root of 2720763261 is about 1396.0369659111.

The spelling of 2720763261 in words is "two billion, seven hundred twenty million, seven hundred sixty-three thousand, two hundred sixty-one".