7738223126261 has 4 divisors (see below), whose sum is σ = 7926960275724. Its totient is φ = 7549485976800.

The previous prime is 7738223126219. The next prime is 7738223126281. The reversal of 7738223126261 is 1626213228377.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1881794086225 + 5856429040036 = 1371785^2 + 2420006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7738223126261 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 (7738223126281) 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, 94368574670 + ... + 94368574751.

It is an arithmetic number, because the mean of its divisors is an integer number (1981740068931).

Almost surely, 2^{7738223126261} is an apocalyptic number.

It is an amenable number.

7738223126261 is a deficient number, since it is larger than the sum of its proper divisors (188737149463).

7738223126261 is a wasteful number, since it uses less digits than its factorization.

7738223126261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188737149462.

The product of its digits is 2032128, while the sum is 50.

The spelling of 7738223126261 in words is "seven trillion, seven hundred thirty-eight billion, two hundred twenty-three million, one hundred twenty-six thousand, two hundred sixty-one".