749181956 has 18 divisors (see below), whose sum is σ = 1316357658. Its totient is φ = 373085760.

The previous prime is 749181949. The next prime is 749182003. The reversal of 749181956 is 659181947.

It can be written as a sum of positive squares in 3 ways, for example, as 29333056 + 719848900 = 5416^2 + 26830^2 .

It is a super-2 number, since 2×749181956² = 1122547206391971872, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 305696 + ... + 308136.

It is an arithmetic number, because the mean of its divisors is an integer number (73130981).

Almost surely, 2^749181956 is an apocalyptic number.

It is an amenable number.

749181956 is a deficient number, since it is larger than the sum of its proper divisors (567175702).

749181956 is a wasteful number, since it uses less digits than its factorization.

749181956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999 (or 2720 counting only the distinct ones).

The product of its digits is 544320, while the sum is 50.

The square root of 749181956 is about 27371.1884287109. The cubic root of 749181956 is about 908.2298463328.

Subtracting from 749181956 its reverse (659181947), we obtain a palindrome (90000009).

The spelling of 749181956 in words is "seven hundred forty-nine million, one hundred eighty-one thousand, nine hundred fifty-six".