40777020991 has 16 divisors (see below), whose sum is σ = 47409004800. Its totient is φ = 34347132288.

The previous prime is 40777020989. The next prime is 40777020997. The reversal of 40777020991 is 19902077704.

It is not a de Polignac number, because 40777020991 - 2¹ = 40777020989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40777020997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1259776 + ... + 1291738.

It is an arithmetic number, because the mean of its divisors is an integer number (2963062800).

Almost surely, 2^40777020991 is an apocalyptic number.

40777020991 is a deficient number, since it is larger than the sum of its proper divisors (6631983809).

40777020991 is a wasteful number, since it uses less digits than its factorization.

40777020991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35118.

The product of its (nonzero) digits is 222264, while the sum is 46.

The spelling of 40777020991 in words is "forty billion, seven hundred seventy-seven million, twenty thousand, nine hundred ninety-one".