749454665640 has 32 divisors (see below), whose sum is σ = 2248363997280. Its totient is φ = 199854577472.

The previous prime is 749454665633. The next prime is 749454665651. The reversal of 749454665640 is 46566454947.

It is a super-4 number, since 4×749454665640⁴ (a number of 49 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3122727654 + ... + 3122727893.

It is an arithmetic number, because the mean of its divisors is an integer number (70261374915).

Almost surely, 2^749454665640 is an apocalyptic number.

It is an amenable number.

749454665640 is an abundant number, since it is smaller than the sum of its proper divisors (1498909331640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

749454665640 is a wasteful number, since it uses less digits than its factorization.

749454665640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6245455561 (or 6245455557 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 60.

The spelling of 749454665640 in words is "seven hundred forty-nine billion, four hundred fifty-four million, six hundred sixty-five thousand, six hundred forty".