1420356691647 has 6 divisors (see below), whose sum is σ = 2051626332392. Its totient is φ = 946904461092.

The previous prime is 1420356691643. The next prime is 1420356691673. The reversal of 1420356691647 is 7461966530241.

It is a happy number.

1420356691647 is a `hidden beast` number, since 1 + 4 + 20 + 3 + 566 + 9 + 16 + 47 = 666.

It is not a de Polignac number, because 1420356691647 - 2² = 1420356691643 is a prime.

It is a super-2 number, since 2×1420356691647² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1420356691593 and 1420356691602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420356691643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78908705083 + ... + 78908705100.

Almost surely, 2^{1420356691647} is an apocalyptic number.

1420356691647 is a deficient number, since it is larger than the sum of its proper divisors (631269640745).

1420356691647 is a wasteful number, since it uses less digits than its factorization.

1420356691647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157817410189 (or 157817410186 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 1420356691647 in words is "one trillion, four hundred twenty billion, three hundred fifty-six million, six hundred ninety-one thousand, six hundred forty-seven".