1647401940887 has 8 divisors (see below), whose sum is σ = 1658501040000. Its totient is φ = 1636331049144.

The previous prime is 1647401940841. The next prime is 1647401940893. The reversal of 1647401940887 is 7880491047461.

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

It is a cyclic number.

It is not a de Polignac number, because 1647401940887 - 2²⁸ = 1647133505431 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 (1647401946887) 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, 6934637 + ... + 7168262.

It is an arithmetic number, because the mean of its divisors is an integer number (207312630000).

Almost surely, 2^{1647401940887} is an apocalyptic number.

1647401940887 is a deficient number, since it is larger than the sum of its proper divisors (11099099113).

1647401940887 is a wasteful number, since it uses less digits than its factorization.

1647401940887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14103685.

The product of its (nonzero) digits is 10838016, while the sum is 59.

The spelling of 1647401940887 in words is "one trillion, six hundred forty-seven billion, four hundred one million, nine hundred forty thousand, eight hundred eighty-seven".