40636136977 has 2 divisors, whose sum is σ = 40636136978. Its totient is φ = 40636136976.

The previous prime is 40636136941. The next prime is 40636137029. The reversal of 40636136977 is 77963163604.

It is an a-pointer prime, because the next prime (40636137029) can be obtained adding 40636136977 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40495927696 + 140209281 = 201236^2 + 11841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40636136977 is a prime.

It is not a weakly prime, because it can be changed into another prime (40636136917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20318068488 + 20318068489.

It is an arithmetic number, because the mean of its divisors is an integer number (20318068489).

Almost surely, 2^40636136977 is an apocalyptic number.

It is an amenable number.

40636136977 is a deficient number, since it is larger than the sum of its proper divisors (1).

40636136977 is an equidigital number, since it uses as much as digits as its factorization.

40636136977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3429216, while the sum is 52.

The spelling of 40636136977 in words is "forty billion, six hundred thirty-six million, one hundred thirty-six thousand, nine hundred seventy-seven".