13555296308921 has 8 divisors (see below), whose sum is σ = 14424790636800. Its totient is φ = 12693815754048.

The previous prime is 13555296308867. The next prime is 13555296308993. The reversal of 13555296308921 is 12980369255531.

It is a happy number.

13555296308921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13555296308921 - 2²⁶ = 13555229200057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13555296308221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2003439761 + ... + 2003446526.

It is an arithmetic number, because the mean of its divisors is an integer number (1803098829600).

Almost surely, 2^{13555296308921} is an apocalyptic number.

It is an amenable number.

13555296308921 is a deficient number, since it is larger than the sum of its proper divisors (869494327879).

13555296308921 is a wasteful number, since it uses less digits than its factorization.

13555296308921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006886503.

The product of its (nonzero) digits is 17496000, while the sum is 59.

The spelling of 13555296308921 in words is "thirteen trillion, five hundred fifty-five billion, two hundred ninety-six million, three hundred eight thousand, nine hundred twenty-one".