647533645077 has 16 divisors (see below), whose sum is σ = 957307567680. Its totient is φ = 386011113600.

The previous prime is 647533645067. The next prime is 647533645081. The reversal of 647533645077 is 770546335746.

It is a happy number.

It is not a de Polignac number, because 647533645077 - 2¹⁹ = 647533120789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647533645067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160835952 + ... + 160839977.

It is an arithmetic number, because the mean of its divisors is an integer number (59831722980).

Almost surely, 2^647533645077 is an apocalyptic number.

It is an amenable number.

647533645077 is a deficient number, since it is larger than the sum of its proper divisors (309773922603).

647533645077 is a wasteful number, since it uses less digits than its factorization.

647533645077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321676004.

The product of its (nonzero) digits is 44452800, while the sum is 57.

The spelling of 647533645077 in words is "six hundred forty-seven billion, five hundred thirty-three million, six hundred forty-five thousand, seventy-seven".