21513161614642 has 8 divisors (see below), whose sum is σ = 32273564517936. Its totient is φ = 10755306775332.

The previous prime is 21513161614639. The next prime is 21513161614751. The reversal of 21513161614642 is 24641616131512.

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

It is a super-2 number, since 2×21513161614642² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636994888 + ... + 637028659.

It is an arithmetic number, because the mean of its divisors is an integer number (4034195564742).

Almost surely, 2^{21513161614642} is an apocalyptic number.

21513161614642 is a deficient number, since it is larger than the sum of its proper divisors (10760402903294).

21513161614642 is a wasteful number, since it uses less digits than its factorization.

21513161614642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274031992.

The product of its digits is 207360, while the sum is 43.

The spelling of 21513161614642 in words is "twenty-one trillion, five hundred thirteen billion, one hundred sixty-one million, six hundred fourteen thousand, six hundred forty-two".