421722657499 has 48 divisors (see below), whose sum is σ = 533703957696. Its totient is φ = 329839994880.

The previous prime is 421722657497. The next prime is 421722657571. The reversal of 421722657499 is 994756227124.

It is not a de Polignac number, because 421722657499 - 2¹ = 421722657497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421722657497) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2677767 + ... + 2830879.

It is an arithmetic number, because the mean of its divisors is an integer number (11118832452).

Almost surely, 2^421722657499 is an apocalyptic number.

421722657499 is a deficient number, since it is larger than the sum of its proper divisors (111981300197).

421722657499 is a wasteful number, since it uses less digits than its factorization.

421722657499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153268 (or 153257 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 58.

The spelling of 421722657499 in words is "four hundred twenty-one billion, seven hundred twenty-two million, six hundred fifty-seven thousand, four hundred ninety-nine".