81432430201325 has 24 divisors (see below), whose sum is σ = 116068446882048. Its totient is φ = 55516609702080.

The previous prime is 81432430201313. The next prime is 81432430201387. The reversal of 81432430201325 is 52310203423418.

It is a de Polignac number, because none of the positive numbers 2^k-81432430201325 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1344848837 + ... + 1344909386.

It is an arithmetic number, because the mean of its divisors is an integer number (4836185286752).

Almost surely, 2^{81432430201325} is an apocalyptic number.

It is an amenable number.

81432430201325 is a deficient number, since it is larger than the sum of its proper divisors (34636016680723).

81432430201325 is a wasteful number, since it uses less digits than its factorization.

81432430201325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689758413 (or 2689758408 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 81432430201325 in words is "eighty-one trillion, four hundred thirty-two billion, four hundred thirty million, two hundred one thousand, three hundred twenty-five".