749408787856 has 15 divisors (see below), whose sum is σ = 1451986235553. Its totient is φ = 374702662560.

The previous prime is 749408787793. The next prime is 749408787859. The reversal of 749408787856 is 658787804947.

The square root of 749408787856 is 865684.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 746696461456 + 2712326400 = 864116^2 + 52080^2 .

It is a super-2 number, since 2×749408787856² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749408787859) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3354526 + ... + 3570946.

Almost surely, 2^749408787856 is an apocalyptic number.

749408787856 is the 865684-th square number.

It is an amenable number.

749408787856 is a deficient number, since it is larger than the sum of its proper divisors (702577447697).

749408787856 is an frugal number, since it uses more digits than its factorization.

749408787856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432850 (or 216423 counting only the distinct ones).

The product of its (nonzero) digits is 758661120, while the sum is 73.

The spelling of 749408787856 in words is "seven hundred forty-nine billion, four hundred eight million, seven hundred eighty-seven thousand, eight hundred fifty-six".