29425628521 has 3 divisors (see below), whose sum is σ = 29425800061. Its totient is φ = 29425456982.

The previous prime is 29425628489. The next prime is 29425628543. The reversal of 29425628521 is 12582652492.

The square root of 29425628521 is 171539.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 29425628521 - 2⁵ = 29425628489 is a prime.

It is a super-2 number, since 2×29425628521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29425628591) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 85770 + ... + 257308.

Almost surely, 2^29425628521 is an apocalyptic number.

29425628521 is the 171539-th square number.

29425628521 is the 85770-th centered octagonal number.

It is an amenable number.

29425628521 is a deficient number, since it is larger than the sum of its proper divisors (171540).

29425628521 is an frugal number, since it uses more digits than its factorization.

29425628521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343078 (or 171539 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The spelling of 29425628521 in words is "twenty-nine billion, four hundred twenty-five million, six hundred twenty-eight thousand, five hundred twenty-one".