749251562721 has 8 divisors (see below), whose sum is σ = 1022234690400. Its totient is φ = 487884738432.

The previous prime is 749251562699. The next prime is 749251562747. The reversal of 749251562721 is 127265152947.

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

It is not a de Polignac number, because 749251562721 - 2⁹ = 749251562209 is a prime.

It is a super-2 number, since 2×749251562721² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (749251562771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2904075696 + ... + 2904075953.

It is an arithmetic number, because the mean of its divisors is an integer number (127779336300).

Almost surely, 2^749251562721 is an apocalyptic number.

It is an amenable number.

749251562721 is a deficient number, since it is larger than the sum of its proper divisors (272983127679).

749251562721 is a wasteful number, since it uses less digits than its factorization.

749251562721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5808151695.

The product of its digits is 2116800, while the sum is 51.

The spelling of 749251562721 in words is "seven hundred forty-nine billion, two hundred fifty-one million, five hundred sixty-two thousand, seven hundred twenty-one".