21155152650613 has 8 divisors (see below), whose sum is σ = 21727010121120. Its totient is φ = 20583300263760.

The previous prime is 21155152650563. The next prime is 21155152650661. The reversal of 21155152650613 is 31605625155112.

It is a happy number.

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 21155152650613 - 2⁹ = 21155152650101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21155152650613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21155152650013) 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, 8082318 + ... + 10374688.

It is an arithmetic number, because the mean of its divisors is an integer number (2715876265140).

Almost surely, 2^{21155152650613} is an apocalyptic number.

It is an amenable number.

21155152650613 is a deficient number, since it is larger than the sum of its proper divisors (571857470507).

21155152650613 is a wasteful number, since it uses less digits than its factorization.

21155152650613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541827.

The product of its (nonzero) digits is 270000, while the sum is 43.

The spelling of 21155152650613 in words is "twenty-one trillion, one hundred fifty-five billion, one hundred fifty-two million, six hundred fifty thousand, six hundred thirteen".