421535291646 has 24 divisors (see below), whose sum is σ = 980714760840. Its totient is φ = 120438654672.

The previous prime is 421535291627. The next prime is 421535291647. The reversal of 421535291646 is 646192535124.

It is a super-3 number, since 3×421535291646³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421535291595 and 421535291604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421535291647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 716896461 + ... + 716897048.

It is an arithmetic number, because the mean of its divisors is an integer number (40863115035).

Almost surely, 2^421535291646 is an apocalyptic number.

421535291646 is an abundant number, since it is smaller than the sum of its proper divisors (559179469194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421535291646 is a wasteful number, since it uses less digits than its factorization.

421535291646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433793528 (or 1433793521 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 48.

The spelling of 421535291646 in words is "four hundred twenty-one billion, five hundred thirty-five million, two hundred ninety-one thousand, six hundred forty-six".