40521920177 has 2 divisors, whose sum is σ = 40521920178. Its totient is φ = 40521920176.

The previous prime is 40521920161. The next prime is 40521920207. The reversal of 40521920177 is 77102912504.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30670166641 + 9851753536 = 175129^2 + 99256^2 .

It is a cyclic number.

It is not a de Polignac number, because 40521920177 - 2⁴ = 40521920161 is a prime.

It is a super-2 number, since 2×40521920177² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40521920177.

It is not a weakly prime, because it can be changed into another prime (40521920107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20260960088 + 20260960089.

It is an arithmetic number, because the mean of its divisors is an integer number (20260960089).

Almost surely, 2^40521920177 is an apocalyptic number.

It is an amenable number.

40521920177 is a deficient number, since it is larger than the sum of its proper divisors (1).

40521920177 is an equidigital number, since it uses as much as digits as its factorization.

40521920177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 40521920177 in words is "forty billion, five hundred twenty-one million, nine hundred twenty thousand, one hundred seventy-seven".