42445665402 has 64 divisors (see below), whose sum is σ = 99704611584. Its totient is φ = 11792010240.

The previous prime is 42445665377. The next prime is 42445665443. The reversal of 42445665402 is 20456654424.

It is a super-2 number, since 2×42445665402² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2685202 + ... + 2700962.

It is an arithmetic number, because the mean of its divisors is an integer number (1557884556).

Almost surely, 2^42445665402 is an apocalyptic number.

42445665402 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 42445665402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49852305792).

42445665402 is an abundant number, since it is smaller than the sum of its proper divisors (57258946182).

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

42445665402 is a wasteful number, since it uses less digits than its factorization.

42445665402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17543.

The product of its (nonzero) digits is 921600, while the sum is 42.

The spelling of 42445665402 in words is "forty-two billion, four hundred forty-five million, six hundred sixty-five thousand, four hundred two".