40778462961 has 8 divisors (see below), whose sum is σ = 60412537760. Its totient is φ = 27185641956.

The previous prime is 40778462957. The next prime is 40778462969. The reversal of 40778462961 is 16926487704.

40778462961 is a `hidden beast` number, since 4 + 0 + 7 + 7 + 8 + 4 + 629 + 6 + 1 = 666.

It is not a de Polignac number, because 40778462961 - 2² = 40778462957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40778462898 and 40778462907.

It is not an unprimeable number, because it can be changed into a prime (40778462969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 755156695 + ... + 755156748.

It is an arithmetic number, because the mean of its divisors is an integer number (7551567220).

Almost surely, 2^40778462961 is an apocalyptic number.

It is an amenable number.

40778462961 is a deficient number, since it is larger than the sum of its proper divisors (19634074799).

40778462961 is a wasteful number, since it uses less digits than its factorization.

40778462961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510313452 (or 1510313446 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 40778462961 in words is "forty billion, seven hundred seventy-eight million, four hundred sixty-two thousand, nine hundred sixty-one".