221761464076607 has 16 divisors (see below), whose sum is σ = 272967968781312. Its totient is φ = 175439831355360.

The previous prime is 221761464076591. The next prime is 221761464076613. The reversal of 221761464076607 is 706670464167122.

It is not a de Polignac number, because 221761464076607 - 2⁴ = 221761464076591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221761464076667) 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, 136609319 + ... + 138223112.

It is an arithmetic number, because the mean of its divisors is an integer number (17060498048832).

Almost surely, 2^{221761464076607} is an apocalyptic number.

221761464076607 is a deficient number, since it is larger than the sum of its proper divisors (51206504704705).

221761464076607 is a wasteful number, since it uses less digits than its factorization.

221761464076607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274841318.

The product of its (nonzero) digits is 28449792, while the sum is 59.

The spelling of 221761464076607 in words is "two hundred twenty-one trillion, seven hundred sixty-one billion, four hundred sixty-four million, seventy-six thousand, six hundred seven".