21777675640041 has 16 divisors (see below), whose sum is σ = 30720311899200. Its totient is φ = 13684502559168.

The previous prime is 21777675639983. The next prime is 21777675640057. The reversal of 21777675640041 is 14004657677712.

It is a happy number.

It is not a de Polignac number, because 21777675640041 - 2⁹ = 21777675639529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (21777625640041) 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, 969695586 + ... + 969718043.

It is an arithmetic number, because the mean of its divisors is an integer number (1920019493700).

Almost surely, 2^{21777675640041} is an apocalyptic number.

It is an amenable number.

21777675640041 is a deficient number, since it is larger than the sum of its proper divisors (8942636259159).

21777675640041 is a wasteful number, since it uses less digits than its factorization.

21777675640041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939413848.

The product of its (nonzero) digits is 13829760, while the sum is 57.

The spelling of 21777675640041 in words is "twenty-one trillion, seven hundred seventy-seven billion, six hundred seventy-five million, six hundred forty thousand, forty-one".