749213113661 has 2 divisors, whose sum is σ = 749213113662. Its totient is φ = 749213113660.

The previous prime is 749213113639. The next prime is 749213113673. The reversal of 749213113661 is 166311312947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 746140074436 + 3073039225 = 863794^2 + 55435^2 .

It is a cyclic number.

It is not a de Polignac number, because 749213113661 - 2²⁶ = 749146004797 is a prime.

It is a super-2 number, since 2×749213113661² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749213115661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374606556830 + 374606556831.

It is an arithmetic number, because the mean of its divisors is an integer number (374606556831).

Almost surely, 2^749213113661 is an apocalyptic number.

It is an amenable number.

749213113661 is a deficient number, since it is larger than the sum of its proper divisors (1).

749213113661 is an equidigital number, since it uses as much as digits as its factorization.

749213113661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The spelling of 749213113661 in words is "seven hundred forty-nine billion, two hundred thirteen million, one hundred thirteen thousand, six hundred sixty-one".