745751978746 has 16 divisors (see below), whose sum is σ = 1160517141000. Its totient is φ = 358986616128.

The previous prime is 745751978731. The next prime is 745751978747. The reversal of 745751978746 is 647879157547.

It can be written as a sum of positive squares in 4 ways, for example, as 694580562225 + 51171416521 = 833415^2 + 226211^2 .

It is a super-2 number, since 2×745751978746² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (745751978747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18400665 + ... + 18441148.

Almost surely, 2^745751978746 is an apocalyptic number.

745751978746 is a deficient number, since it is larger than the sum of its proper divisors (414765162254).

745751978746 is a wasteful number, since it uses less digits than its factorization.

745751978746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36842193.

The product of its digits is 414892800, while the sum is 70.

The spelling of 745751978746 in words is "seven hundred forty-five billion, seven hundred fifty-one million, nine hundred seventy-eight thousand, seven hundred forty-six".