40002800077 has 2 divisors, whose sum is σ = 40002800078. Its totient is φ = 40002800076.

The previous prime is 40002800029. The next prime is 40002800143. The reversal of 40002800077 is 77000820004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39883684681 + 119115396 = 199709^2 + 10914^2 .

It is a cyclic number.

It is not a de Polignac number, because 40002800077 - 2¹⁵ = 40002767309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40002840077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20001400038 + 20001400039.

It is an arithmetic number, because the mean of its divisors is an integer number (20001400039).

Almost surely, 2^40002800077 is an apocalyptic number.

It is an amenable number.

40002800077 is a deficient number, since it is larger than the sum of its proper divisors (1).

40002800077 is an equidigital number, since it uses as much as digits as its factorization.

40002800077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 28.

Subtracting from 40002800077 its sum of digits (28), we obtain a square (40002800049 = 200007²).

The spelling of 40002800077 in words is "forty billion, two million, eight hundred thousand, seventy-seven".