2572166391 has 8 divisors (see below), whose sum is σ = 3447325680. Its totient is φ = 1705892352.

The previous prime is 2572166371. The next prime is 2572166423. The reversal of 2572166391 is 1936612752.

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

It is not a de Polignac number, because 2572166391 - 2¹⁰ = 2572165367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2572166371) 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, 2220636 + ... + 2221793.

It is an arithmetic number, because the mean of its divisors is an integer number (430915710).

Almost surely, 2^2572166391 is an apocalyptic number.

2572166391 is a deficient number, since it is larger than the sum of its proper divisors (875159289).

2572166391 is a wasteful number, since it uses less digits than its factorization.

2572166391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4442625.

The product of its digits is 136080, while the sum is 42.

The square root of 2572166391 is about 50716.5297610158. The cubic root of 2572166391 is about 1370.1444412327.

The spelling of 2572166391 in words is "two billion, five hundred seventy-two million, one hundred sixty-six thousand, three hundred ninety-one".