40861878169 has 12 divisors (see below), whose sum is σ = 47543009844. Its totient is φ = 35017242624.

The previous prime is 40861878163. The next prime is 40861878229. The reversal of 40861878169 is 96187816804.

40861878169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 23107648144 + 17754230025 = 152012^2 + 133245^2 .

It is not a de Polignac number, because 40861878169 - 2⁵ = 40861878137 is a prime.

It is a super-2 number, since 2×40861878169² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40861878163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161149 + ... + 328165.

It is an arithmetic number, because the mean of its divisors is an integer number (3961917487).

Almost surely, 2^40861878169 is an apocalyptic number.

40861878169 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

40861878169 is a deficient number, since it is larger than the sum of its proper divisors (6681131675).

40861878169 is a wasteful number, since it uses less digits than its factorization.

40861878169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172024 (or 172017 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 40861878169 in words is "forty billion, eight hundred sixty-one million, eight hundred seventy-eight thousand, one hundred sixty-nine".