42212546865 has 144 divisors (see below), whose sum is σ = 78384983040. Its totient is φ = 20999139840.

The previous prime is 42212546851. The next prime is 42212546903. The reversal of 42212546865 is 56864521224.

42212546865 is a `hidden beast` number, since 4 + 2 + 2 + 125 + 468 + 65 = 666.

It is not a de Polignac number, because 42212546865 - 2¹⁷ = 42212415793 is a prime.

It is a super-2 number, since 2×42212546865² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 42212546865.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 176621416 + ... + 176621654.

It is an arithmetic number, because the mean of its divisors is an integer number (544340160).

Almost surely, 2^42212546865 is an apocalyptic number.

42212546865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42212546865 is a deficient number, since it is larger than the sum of its proper divisors (36172436175).

42212546865 is a wasteful number, since it uses less digits than its factorization.

42212546865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 392 counting only the distinct ones).

The product of its digits is 921600, while the sum is 45.

The spelling of 42212546865 in words is "forty-two billion, two hundred twelve million, five hundred forty-six thousand, eight hundred sixty-five".