21770106412491 has 24 divisors (see below), whose sum is σ = 32337998550000. Its totient is φ = 14107106314752.

The previous prime is 21770106412469. The next prime is 21770106412529. The reversal of 21770106412491 is 19421460107712.

21770106412491 is a `hidden beast` number, since 2 + 17 + 7 + 0 + 106 + 41 + 2 + 491 = 666.

It is not a de Polignac number, because 21770106412491 - 2¹⁰ = 21770106411467 is a prime.

It is a super-2 number, since 2×21770106412491² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21770106412091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 230280366 + ... + 230374883.

It is an arithmetic number, because the mean of its divisors is an integer number (1347416606250).

Almost surely, 2^{21770106412491} is an apocalyptic number.

21770106412491 is a deficient number, since it is larger than the sum of its proper divisors (10567892137509).

21770106412491 is a wasteful number, since it uses less digits than its factorization.

21770106412491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460655403 (or 460655400 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 21770106412491 in words is "twenty-one trillion, seven hundred seventy billion, one hundred six million, four hundred twelve thousand, four hundred ninety-one".