16070571421 has 4 divisors (see below), whose sum is σ = 16071461692. Its totient is φ = 16069681152.

The previous prime is 16070571401. The next prime is 16070571449. The reversal of 16070571421 is 12417507061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12417507061 = 1579 ⋅7864159.

It can be written as a sum of positive squares in 2 ways, for example, as 8376825625 + 7693745796 = 91525^2 + 87714^2 .

It is a cyclic number.

It is not a de Polignac number, because 16070571421 - 2⁵ = 16070571389 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 (16070571401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417486 + ... + 454351.

It is an arithmetic number, because the mean of its divisors is an integer number (4017865423).

Almost surely, 2^16070571421 is an apocalyptic number.

It is an amenable number.

16070571421 is a deficient number, since it is larger than the sum of its proper divisors (890271).

16070571421 is an equidigital number, since it uses as much as digits as its factorization.

16070571421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890270.

The product of its (nonzero) digits is 11760, while the sum is 34.

The spelling of 16070571421 in words is "sixteen billion, seventy million, five hundred seventy-one thousand, four hundred twenty-one".