20160521601 has 12 divisors (see below), whose sum is σ = 29546550096. Its totient is φ = 12218497720.

The previous prime is 20160521597. The next prime is 20160521609. The reversal of 20160521601 is 10612506102.

It is not a de Polignac number, because 20160521601 - 2² = 20160521597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20160521609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27768951 + ... + 27769676.

It is an arithmetic number, because the mean of its divisors is an integer number (2462212508).

Almost surely, 2^20160521601 is an apocalyptic number.

It is an amenable number.

20160521601 is a deficient number, since it is larger than the sum of its proper divisors (9386028495).

20160521601 is a wasteful number, since it uses less digits than its factorization.

20160521601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55538652 (or 55538641 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The spelling of 20160521601 in words is "twenty billion, one hundred sixty million, five hundred twenty-one thousand, six hundred one".