647974501357 has 8 divisors (see below), whose sum is σ = 668248693112. Its totient is φ = 627845644800.

The previous prime is 647974501351. The next prime is 647974501379. The reversal of 647974501357 is 753105479746.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 253030126441 + 394944374916 = 503021^2 + 628446^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647974501357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647974501351) 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, 36324744 + ... + 36342577.

It is an arithmetic number, because the mean of its divisors is an integer number (83531086639).

Almost surely, 2^647974501357 is an apocalyptic number.

It is an amenable number.

647974501357 is a deficient number, since it is larger than the sum of its proper divisors (20274191755).

647974501357 is a wasteful number, since it uses less digits than its factorization.

647974501357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72667599.

The product of its (nonzero) digits is 22226400, while the sum is 58.

The spelling of 647974501357 in words is "six hundred forty-seven billion, nine hundred seventy-four million, five hundred one thousand, three hundred fifty-seven".