7749668731 has 4 divisors (see below), whose sum is σ = 8856764272. Its totient is φ = 6642573192.

The previous prime is 7749668713. The next prime is 7749668791. The reversal of 7749668731 is 1378669477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1378669477 = 2441 ⋅564797.

It is a cyclic number.

It is not a de Polignac number, because 7749668731 - 2²⁵ = 7716114299 is a prime.

It is a super-2 number, since 2×7749668731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7749668791) 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, 553547760 + ... + 553547773.

It is an arithmetic number, because the mean of its divisors is an integer number (2214191068).

Almost surely, 2^7749668731 is an apocalyptic number.

7749668731 is a deficient number, since it is larger than the sum of its proper divisors (1107095541).

7749668731 is a wasteful number, since it uses less digits than its factorization.

7749668731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107095540.

The product of its digits is 10668672, while the sum is 58.

The square root of 7749668731 is about 88032.2028067002. The cubic root of 7749668731 is about 1978.9176081633.

The spelling of 7749668731 in words is "seven billion, seven hundred forty-nine million, six hundred sixty-eight thousand, seven hundred thirty-one".