65421375571 has 8 divisors (see below), whose sum is σ = 66331138464. Its totient is φ = 64511979840.

The previous prime is 65421375563. The next prime is 65421375583. The reversal of 65421375571 is 17557312456.

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

It is a cyclic number.

It is not a de Polignac number, because 65421375571 - 2³ = 65421375563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65421375671) 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, 277290 + ... + 455776.

It is an arithmetic number, because the mean of its divisors is an integer number (8291392308).

Almost surely, 2^65421375571 is an apocalyptic number.

65421375571 is a deficient number, since it is larger than the sum of its proper divisors (909762893).

65421375571 is a wasteful number, since it uses less digits than its factorization.

65421375571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183581.

The product of its digits is 882000, while the sum is 46.

The spelling of 65421375571 in words is "sixty-five billion, four hundred twenty-one million, three hundred seventy-five thousand, five hundred seventy-one".