743251536661 has 16 divisors (see below), whose sum is σ = 753170811120. Its totient is φ = 733413173760.

The previous prime is 743251536553. The next prime is 743251536667. The reversal of 743251536661 is 166635152347.

It can be written as a sum of positive squares in 8 ways, for example, as 2842915761 + 740408620900 = 53319^2 + 860470^2 .

It is a cyclic number.

It is not a de Polignac number, because 743251536661 - 2¹⁹ = 743251012373 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 (743251536667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15915001 + ... + 15961633.

It is an arithmetic number, because the mean of its divisors is an integer number (47073175695).

Almost surely, 2^743251536661 is an apocalyptic number.

It is an amenable number.

743251536661 is a deficient number, since it is larger than the sum of its proper divisors (9919274459).

743251536661 is a wasteful number, since it uses less digits than its factorization.

743251536661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47496.

The product of its digits is 2721600, while the sum is 49.

The spelling of 743251536661 in words is "seven hundred forty-three billion, two hundred fifty-one million, five hundred thirty-six thousand, six hundred sixty-one".