40021348777 has 2 divisors, whose sum is σ = 40021348778. Its totient is φ = 40021348776.

The previous prime is 40021348769. The next prime is 40021348823. The reversal of 40021348777 is 77784312004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39972404761 + 48944016 = 199931^2 + 6996^2 .

It is a cyclic number.

It is not a de Polignac number, because 40021348777 - 2³ = 40021348769 is a prime.

It is not a weakly prime, because it can be changed into another prime (40021349777) 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, 20010674388 + 20010674389.

It is an arithmetic number, because the mean of its divisors is an integer number (20010674389).

Almost surely, 2^40021348777 is an apocalyptic number.

It is an amenable number.

40021348777 is a deficient number, since it is larger than the sum of its proper divisors (1).

40021348777 is an equidigital number, since it uses as much as digits as its factorization.

40021348777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 263424, while the sum is 43.

The spelling of 40021348777 in words is "forty billion, twenty-one million, three hundred forty-eight thousand, seven hundred seventy-seven".