3756633649 has 4 divisors (see below), whose sum is σ = 3776302080. Its totient is φ = 3736965220.

The previous prime is 3756633607. The next prime is 3756633691. The reversal of 3756633649 is 9463366573.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9463366573 = 5351 ⋅1768523.

It is an interprime number because it is at equal distance from previous prime (3756633607) and next prime (3756633691).

It is a cyclic number.

It is not a de Polignac number, because 3756633649 - 2²⁹ = 3219762737 is a prime.

It is a super-2 number, since 2×3756633649² = 28224592745598110402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3756633596 and 3756633605.

It is not an unprimeable number, because it can be changed into a prime (3756633949) 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, 9833929 + ... + 9834310.

It is an arithmetic number, because the mean of its divisors is an integer number (944075520).

Almost surely, 2^3756633649 is an apocalyptic number.

It is an amenable number.

3756633649 is a deficient number, since it is larger than the sum of its proper divisors (19668431).

3756633649 is a wasteful number, since it uses less digits than its factorization.

3756633649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19668430.

The product of its digits is 7348320, while the sum is 52.

The square root of 3756633649 is about 61291.3831545675. The cubic root of 3756633649 is about 1554.5318150899.

The spelling of 3756633649 in words is "three billion, seven hundred fifty-six million, six hundred thirty-three thousand, six hundred forty-nine".