85272019621 has 4 divisors (see below), whose sum is σ = 86669921644. Its totient is φ = 83874117600.

The previous prime is 85272019619. The next prime is 85272019661. The reversal of 85272019621 is 12691027258.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11334796225 + 73937223396 = 106465^2 + 271914^2 .

It is a cyclic number.

It is not a de Polignac number, because 85272019621 - 2¹ = 85272019619 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 (85272019661) 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, 698950920 + ... + 698951041.

It is an arithmetic number, because the mean of its divisors is an integer number (21667480411).

Almost surely, 2^85272019621 is an apocalyptic number.

It is an amenable number.

85272019621 is a deficient number, since it is larger than the sum of its proper divisors (1397902023).

85272019621 is a wasteful number, since it uses less digits than its factorization.

85272019621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397902022.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 85272019621 in words is "eighty-five billion, two hundred seventy-two million, nineteen thousand, six hundred twenty-one".