746397856778 has 20 divisors (see below), whose sum is σ = 1306118540370. Its totient is φ = 319884793704.

The previous prime is 746397856717. The next prime is 746397856781. The reversal of 746397856778 is 877658793647.

It can be written as a sum of positive squares in only one way, i.e., 387684305449 + 358713551329 = 622643^2 + 598927^2 .

It is a junction number, because it is equal to n+sod(n) for n = 746397856699 and 746397856708.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 77712593 + ... + 77722196.

Almost surely, 2^746397856778 is an apocalyptic number.

746397856778 is a deficient number, since it is larger than the sum of its proper divisors (559720683592).

746397856778 is an equidigital number, since it uses as much as digits as its factorization.

746397856778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155434819 (or 155434798 counting only the distinct ones).

The product of its digits is 2987228160, while the sum is 77.

The spelling of 746397856778 in words is "seven hundred forty-six billion, three hundred ninety-seven million, eight hundred fifty-six thousand, seven hundred seventy-eight".