1421931961647 has 24 divisors (see below), whose sum is σ = 2089269069888. Its totient is φ = 931656513600.

The previous prime is 1421931961607. The next prime is 1421931961649. The reversal of 1421931961647 is 7461691391241.

1421931961647 is a `hidden beast` number, since 1 + 4 + 2 + 1 + 9 + 3 + 19 + 616 + 4 + 7 = 666.

It is not a de Polignac number, because 1421931961647 - 2¹⁴ = 1421931945263 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1421931961593 and 1421931961602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421931961649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 376188 + ... + 1727825.

It is an arithmetic number, because the mean of its divisors is an integer number (87052877912).

Almost surely, 2^{1421931961647} is an apocalyptic number.

1421931961647 is a deficient number, since it is larger than the sum of its proper divisors (667337108241).

1421931961647 is a wasteful number, since it uses less digits than its factorization.

1421931961647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105311 (or 2105308 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 1421931961647 in words is "one trillion, four hundred twenty-one billion, nine hundred thirty-one million, nine hundred sixty-one thousand, six hundred forty-seven".