3748757781 has 8 divisors (see below), whose sum is σ = 5019258240. Its totient is φ = 2488714592.

The previous prime is 3748757777. The next prime is 3748757807. The reversal of 3748757781 is 1877578473.

3748757781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3748757781 - 2² = 3748757777 is a prime.

It is a super-2 number, since 2×3748757781² = 28106369801216087922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3748757081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2613480 + ... + 2614913.

It is an arithmetic number, because the mean of its divisors is an integer number (627407280).

Almost surely, 2^3748757781 is an apocalyptic number.

It is an amenable number.

3748757781 is a deficient number, since it is larger than the sum of its proper divisors (1270500459).

3748757781 is a wasteful number, since it uses less digits than its factorization.

3748757781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5228635.

The product of its digits is 9219840, while the sum is 57.

The square root of 3748757781 is about 61227.1000538160. The cubic root of 3748757781 is about 1553.4446845530. Note that the first 3 decimals are identical.

The spelling of 3748757781 in words is "three billion, seven hundred forty-eight million, seven hundred fifty-seven thousand, seven hundred eighty-one".