745130256646 has 4 divisors (see below), whose sum is σ = 1117695384972. Its totient is φ = 372565128322.

The previous prime is 745130256643. The next prime is 745130256653. The reversal of 745130256646 is 646652031547.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 745130256646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745130256641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186282564160 + ... + 186282564163.

It is an arithmetic number, because the mean of its divisors is an integer number (279423846243).

Almost surely, 2^745130256646 is an apocalyptic number.

745130256646 is a deficient number, since it is larger than the sum of its proper divisors (372565128326).

745130256646 is a wasteful number, since it uses less digits than its factorization.

745130256646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372565128325.

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 745130256646 in words is "seven hundred forty-five billion, one hundred thirty million, two hundred fifty-six thousand, six hundred forty-six".