749601991691 has 8 divisors (see below), whose sum is σ = 856716695520. Its totient is φ = 642494464128.

The previous prime is 749601991669. The next prime is 749601991717. The reversal of 749601991691 is 196199106947.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 749601991691 - 2¹⁴ = 749601975307 is a prime.

It is a super-2 number, since 2×749601991691² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (749601997691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1568336 + ... + 1989693.

It is an arithmetic number, because the mean of its divisors is an integer number (107089586940).

Almost surely, 2^749601991691 is an apocalyptic number.

749601991691 is a deficient number, since it is larger than the sum of its proper divisors (107114703829).

749601991691 is a wasteful number, since it uses less digits than its factorization.

749601991691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588133.

The product of its (nonzero) digits is 6613488, while the sum is 62.

The spelling of 749601991691 in words is "seven hundred forty-nine billion, six hundred one million, nine hundred ninety-one thousand, six hundred ninety-one".