421811447490861 has 64 divisors (see below), whose sum is σ = 597589450260480. Its totient is φ = 263905924988160.

The previous prime is 421811447490817. The next prime is 421811447490877. The reversal of 421811447490861 is 168094744118124.

It is not a de Polignac number, because 421811447490861 - 2¹⁰ = 421811447489837 is a prime.

It is a super-2 number, since 2×421811447490861² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421811447490795 and 421811447490804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421811447495861) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13632751651 + ... + 13632782591.

It is an arithmetic number, because the mean of its divisors is an integer number (9337335160320).

Almost surely, 2^{421811447490861} is an apocalyptic number.

It is an amenable number.

421811447490861 is a deficient number, since it is larger than the sum of its proper divisors (175778002769619).

421811447490861 is a wasteful number, since it uses less digits than its factorization.

421811447490861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33906.

The product of its (nonzero) digits is 12386304, while the sum is 60.

The spelling of 421811447490861 in words is "four hundred twenty-one trillion, eight hundred eleven billion, four hundred forty-seven million, four hundred ninety thousand, eight hundred sixty-one".