40979511945 has 24 divisors (see below), whose sum is σ = 71234709000. Its totient is φ = 21793107456.

The previous prime is 40979511913. The next prime is 40979511973. The reversal of 40979511945 is 54911597904.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1713711609 + 39265800336 = 41397^2 + 198156^2 .

It is not a de Polignac number, because 40979511945 - 2⁵ = 40979511913 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40979511891 and 40979511900.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1288960 + ... + 1320369.

It is an arithmetic number, because the mean of its divisors is an integer number (2968112875).

Almost surely, 2^40979511945 is an apocalyptic number.

40979511945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40979511945 is a deficient number, since it is larger than the sum of its proper divisors (30255197055).

40979511945 is a wasteful number, since it uses less digits than its factorization.

40979511945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609689 (or 2609686 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 54.

The spelling of 40979511945 in words is "forty billion, nine hundred seventy-nine million, five hundred eleven thousand, nine hundred forty-five".