21777157059 has 32 divisors (see below), whose sum is σ = 35743150080. Its totient is φ = 11514962592.

The previous prime is 21777157057. The next prime is 21777157069. The reversal of 21777157059 is 95075177712.

It is not a de Polignac number, because 21777157059 - 2¹ = 21777157057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21777157057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 617487 + ... + 651800.

It is an arithmetic number, because the mean of its divisors is an integer number (1116973440).

Almost surely, 2^21777157059 is an apocalyptic number.

21777157059 is a deficient number, since it is larger than the sum of its proper divisors (13965993021).

21777157059 is a wasteful number, since it uses less digits than its factorization.

21777157059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269359.

The product of its (nonzero) digits is 1080450, while the sum is 51.

The spelling of 21777157059 in words is "twenty-one billion, seven hundred seventy-seven million, one hundred fifty-seven thousand, fifty-nine".