647542245746 has 64 divisors (see below), whose sum is σ = 1139291464320. Its totient is φ = 272744693760.

The previous prime is 647542245743. The next prime is 647542245761.

647542245746 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 647542245691 and 647542245700.

It is not an unprimeable number, because it can be changed into a prime (647542245743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56951150 + ... + 56962518.

It is an arithmetic number, because the mean of its divisors is an integer number (17801429130).

Almost surely, 2^647542245746 is an apocalyptic number.

647542245746 is a deficient number, since it is larger than the sum of its proper divisors (491749218574).

647542245746 is a wasteful number, since it uses less digits than its factorization.

647542245746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13739.

The product of its digits is 45158400, while the sum is 56.

The spelling of 647542245746 in words is "six hundred forty-seven billion, five hundred forty-two million, two hundred forty-five thousand, seven hundred forty-six".