3720436261 has 4 divisors (see below), whose sum is σ = 3758791372. Its totient is φ = 3682081152.

The previous prime is 3720436229. The next prime is 3720436273. The reversal of 3720436261 is 1626340273.

3720436261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1626340273 = 23297 ⋅69809.

It can be written as a sum of positive squares in 2 ways, for example, as 3087913761 + 632522500 = 55569^2 + 25150^2 .

It is a cyclic number.

It is not a de Polignac number, because 3720436261 - 2⁵ = 3720436229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3720436861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19177410 + ... + 19177603.

It is an arithmetic number, because the mean of its divisors is an integer number (939697843).

Almost surely, 2^3720436261 is an apocalyptic number.

It is an amenable number.

3720436261 is a deficient number, since it is larger than the sum of its proper divisors (38355111).

3720436261 is an equidigital number, since it uses as much as digits as its factorization.

3720436261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38355110.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 3720436261 is about 60995.3790134958. The cubic root of 3720436261 is about 1549.5227474128.

It can be divided in two parts, 37 and 20436261, that multiplied together give a palindrome (756141657).

The spelling of 3720436261 in words is "three billion, seven hundred twenty million, four hundred thirty-six thousand, two hundred sixty-one".