1636350042440 has 128 divisors (see below), whose sum is σ = 3815328614400. Its totient is φ = 630968279040.

The previous prime is 1636350042401. The next prime is 1636350042443. The reversal of 1636350042440 is 442400536361.

It is a super-2 number, since 2×1636350042440² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1636350042394 and 1636350042403.

It is not an unprimeable number, because it can be changed into a prime (1636350042443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452403512 + ... + 452407128.

It is an arithmetic number, because the mean of its divisors is an integer number (29807254800).

Almost surely, 2^{1636350042440} is an apocalyptic number.

1636350042440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1636350042440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1907664307200).

1636350042440 is an abundant number, since it is smaller than the sum of its proper divisors (2178978571960).

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

1636350042440 is a wasteful number, since it uses less digits than its factorization.

1636350042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975 (or 4971 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 1636350042440 in words is "one trillion, six hundred thirty-six billion, three hundred fifty million, forty-two thousand, four hundred forty".