21629155071 has 8 divisors (see below), whose sum is σ = 28864421680. Its totient is φ = 14406662592.

The previous prime is 21629155043. The next prime is 21629155087. The reversal of 21629155071 is 17055192612.

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

It is not a de Polignac number, because 21629155071 - 2²¹ = 21627057919 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 (21629155021) 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, 3189580 + ... + 3196353.

It is an arithmetic number, because the mean of its divisors is an integer number (3608052710).

Almost surely, 2^21629155071 is an apocalyptic number.

21629155071 is a deficient number, since it is larger than the sum of its proper divisors (7235266609).

21629155071 is a wasteful number, since it uses less digits than its factorization.

21629155071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6387065.

The product of its (nonzero) digits is 37800, while the sum is 39.

The spelling of 21629155071 in words is "twenty-one billion, six hundred twenty-nine million, one hundred fifty-five thousand, seventy-one".