13555666214465 has 16 divisors (see below), whose sum is σ = 16614849565440. Its totient is φ = 10612553677440.

The previous prime is 13555666214423. The next prime is 13555666214479. The reversal of 13555666214465 is 56441266655531.

It is a happy number.

It is not a de Polignac number, because 13555666214465 - 2⁶ = 13555666214401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1370996 + ... + 5384325.

It is an arithmetic number, because the mean of its divisors is an integer number (1038428097840).

Almost surely, 2^{13555666214465} is an apocalyptic number.

It is an amenable number.

13555666214465 is a deficient number, since it is larger than the sum of its proper divisors (3059183350975).

13555666214465 is an equidigital number, since it uses as much as digits as its factorization.

13555666214465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6763912.

The product of its digits is 77760000, while the sum is 59.

The spelling of 13555666214465 in words is "thirteen trillion, five hundred fifty-five billion, six hundred sixty-six million, two hundred fourteen thousand, four hundred sixty-five".