749035538981 has 4 divisors (see below), whose sum is σ = 774864350700. Its totient is φ = 723206727264.

The previous prime is 749035538963. The next prime is 749035538989. The reversal of 749035538981 is 189835530947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 189835530947 = 2833 ⋅67008659.

It can be written as a sum of positive squares in 2 ways, for example, as 181702702756 + 567332836225 = 426266^2 + 753215^2 .

It is a cyclic number.

It is not a de Polignac number, because 749035538981 - 2¹⁸ = 749035276837 is a prime.

It is a super-2 number, since 2×749035538981² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749035538989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12914405816 + ... + 12914405873.

It is an arithmetic number, because the mean of its divisors is an integer number (193716087675).

Almost surely, 2^749035538981 is an apocalyptic number.

It is an amenable number.

749035538981 is a deficient number, since it is larger than the sum of its proper divisors (25828811719).

749035538981 is a wasteful number, since it uses less digits than its factorization.

749035538981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25828811718.

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 749035538981 in words is "seven hundred forty-nine billion, thirty-five million, five hundred thirty-eight thousand, nine hundred eighty-one".