3747415681 has 2 divisors, whose sum is σ = 3747415682. Its totient is φ = 3747415680.

The previous prime is 3747415669. The next prime is 3747415697. The reversal of 3747415681 is 1865147473.

3747415681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2258150400 + 1489265281 = 47520^2 + 38591^2 .

It is a cyclic number.

It is not a de Polignac number, because 3747415681 - 2²¹ = 3745318529 is a prime.

It is a super-2 number, since 2×3747415681² = 28086248572409387522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3747415381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1873707840 + 1873707841.

It is an arithmetic number, because the mean of its divisors is an integer number (1873707841).

Almost surely, 2^3747415681 is an apocalyptic number.

It is an amenable number.

3747415681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3747415681 is an equidigital number, since it uses as much as digits as its factorization.

3747415681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 46.

The square root of 3747415681 is about 61216.1390566246. The cubic root of 3747415681 is about 1553.2592785166.

It can be divided in two parts, 3747415 and 681, that added together give a 4-th power (3748096 = 44⁴).

The spelling of 3747415681 in words is "three billion, seven hundred forty-seven million, four hundred fifteen thousand, six hundred eighty-one".