115515535404421 has 64 divisors (see below), whose sum is σ = 125098612531200. Its totient is φ = 106486907904000.

The previous prime is 115515535404419. The next prime is 115515535404463. The reversal of 115515535404421 is 124404535515511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 115515535404421 - 2¹ = 115515535404419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115515535404821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1754482420 + ... + 1754548258.

It is an arithmetic number, because the mean of its divisors is an integer number (1954665820800).

Almost surely, 2^{115515535404421} is an apocalyptic number.

It is an amenable number.

115515535404421 is a deficient number, since it is larger than the sum of its proper divisors (9583077126779).

115515535404421 is a wasteful number, since it uses less digits than its factorization.

115515535404421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66230.

The product of its (nonzero) digits is 1200000, while the sum is 46.

The spelling of 115515535404421 in words is "one hundred fifteen trillion, five hundred fifteen billion, five hundred thirty-five million, four hundred four thousand, four hundred twenty-one".