647135245690 has 16 divisors (see below), whose sum is σ = 1215488809728. Its totient is φ = 247599572176.

The previous prime is 647135245661. The next prime is 647135245733. The reversal of 647135245690 is 96542531746.

It is a super-2 number, since 2×647135245690² (a number of 24 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1406815522 + ... + 1406815981.

It is an arithmetic number, because the mean of its divisors is an integer number (75968050608).

Almost surely, 2^647135245690 is an apocalyptic number.

647135245690 is a deficient number, since it is larger than the sum of its proper divisors (568353564038).

647135245690 is a wasteful number, since it uses less digits than its factorization.

647135245690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813631533.

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 647135245690 in words is "six hundred forty-seven billion, one hundred thirty-five million, two hundred forty-five thousand, six hundred ninety".