749890512405 has 24 divisors (see below), whose sum is σ = 1306991507640. Its totient is φ = 397731980160.

The previous prime is 749890512389. The next prime is 749890512431. The reversal of 749890512405 is 504215098947.

It is a happy number.

749890512405 is a `hidden beast` number, since 7 + 4 + 9 + 89 + 0 + 512 + 40 + 5 = 666.

749890512405 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 4 ways, for example, as 77939797329 + 671950715076 = 279177^2 + 819726^2 .

It is not a de Polignac number, because 749890512405 - 2⁴ = 749890512389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46025650 + ... + 46041939.

It is an arithmetic number, because the mean of its divisors is an integer number (54457979485).

Almost surely, 2^749890512405 is an apocalyptic number.

It is an amenable number.

749890512405 is a deficient number, since it is larger than the sum of its proper divisors (557100995235).

749890512405 is a wasteful number, since it uses less digits than its factorization.

749890512405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92067781 (or 92067778 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 749890512405 in words is "seven hundred forty-nine billion, eight hundred ninety million, five hundred twelve thousand, four hundred five".