40042008977 has 2 divisors, whose sum is σ = 40042008978. Its totient is φ = 40042008976.

The previous prime is 40042008961. The next prime is 40042009001. The reversal of 40042008977 is 77980024004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40041610816 + 398161 = 200104^2 + 631^2 .

It is a cyclic number.

It is not a de Polignac number, because 40042008977 - 2⁴ = 40042008961 is a prime.

It is not a weakly prime, because it can be changed into another prime (40042008577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021004488 + 20021004489.

It is an arithmetic number, because the mean of its divisors is an integer number (20021004489).

Almost surely, 2^40042008977 is an apocalyptic number.

It is an amenable number.

40042008977 is a deficient number, since it is larger than the sum of its proper divisors (1).

40042008977 is an equidigital number, since it uses as much as digits as its factorization.

40042008977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 40042008977 in words is "forty billion, forty-two million, eight thousand, nine hundred seventy-seven".