2672145391 has 4 divisors (see below), whose sum is σ = 2829330432. Its totient is φ = 2514960352.

The previous prime is 2672145349. The next prime is 2672145397. The reversal of 2672145391 is 1935412762.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1935412762 = 2 ⋅967706381.

It is a cyclic number.

It is not a de Polignac number, because 2672145391 - 2¹¹ = 2672143343 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2672145397) 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, 78592495 + ... + 78592528.

It is an arithmetic number, because the mean of its divisors is an integer number (707332608).

Almost surely, 2^2672145391 is an apocalyptic number.

2672145391 is a deficient number, since it is larger than the sum of its proper divisors (157185041).

2672145391 is a wasteful number, since it uses less digits than its factorization.

2672145391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157185040.

The product of its digits is 90720, while the sum is 40.

The square root of 2672145391 is about 51692.7982508202. The cubic root of 2672145391 is about 1387.6715828820.

The spelling of 2672145391 in words is "two billion, six hundred seventy-two million, one hundred forty-five thousand, three hundred ninety-one".