421520001632 has 24 divisors (see below), whose sum is σ = 830011368816. Its totient is φ = 210723463552.

The previous prime is 421520001599. The next prime is 421520001647. The reversal of 421520001632 is 236100025124.

It is a happy number.

It is a super-2 number, since 2×421520001632² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 953843 + ... + 1323954.

It is an arithmetic number, because the mean of its divisors is an integer number (34583807034).

Almost surely, 2^421520001632 is an apocalyptic number.

It is an amenable number.

421520001632 is a deficient number, since it is larger than the sum of its proper divisors (408491367184).

421520001632 is a wasteful number, since it uses less digits than its factorization.

421520001632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283590 (or 2283582 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 421520001632 its reverse (236100025124), we get a palindrome (657620026756).

The spelling of 421520001632 in words is "four hundred twenty-one billion, five hundred twenty million, one thousand, six hundred thirty-two".