221411640666454 has 16 divisors (see below), whose sum is σ = 388820442146976. Its totient is φ = 92576295748800.

The previous prime is 221411640666379. The next prime is 221411640666479. The reversal of 221411640666454 is 454666046114122.

It is a super-2 number, since 2×221411640666454² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192867282237 + ... + 192867283384.

It is an arithmetic number, because the mean of its divisors is an integer number (24301277634186).

Almost surely, 2^{221411640666454} is an apocalyptic number.

221411640666454 is a deficient number, since it is larger than the sum of its proper divisors (167408801480522).

221411640666454 is a wasteful number, since it uses less digits than its factorization.

221411640666454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385734565671.

The product of its (nonzero) digits is 6635520, while the sum is 52.

The spelling of 221411640666454 in words is "two hundred twenty-one trillion, four hundred eleven billion, six hundred forty million, six hundred sixty-six thousand, four hundred fifty-four".