749161637 has 12 divisors (see below), whose sum is σ = 879192396. Its totient is φ = 636451200.

The previous prime is 749161613. The next prime is 749161643. The reversal of 749161637 is 736161947.

749161637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 203518756 + 545642881 = 14266^2 + 23359^2 .

It is not a de Polignac number, because 749161637 - 2⁶ = 749161573 is a prime.

It is a super-2 number, since 2×749161637² = 1122486316705039538, which 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 (749161337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62114 + ... + 73187.

It is an arithmetic number, because the mean of its divisors is an integer number (73266033).

Almost surely, 2^749161637 is an apocalyptic number.

It is an amenable number.

749161637 is a deficient number, since it is larger than the sum of its proper divisors (130030759).

749161637 is a wasteful number, since it uses less digits than its factorization.

749161637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135428 (or 135421 counting only the distinct ones).

The product of its digits is 190512, while the sum is 44.

The square root of 749161637 is about 27370.8172512258. The cubic root of 749161637 is about 908.2216353817.

The spelling of 749161637 in words is "seven hundred forty-nine million, one hundred sixty-one thousand, six hundred thirty-seven".