2609139551 has 4 divisors (see below), whose sum is σ = 2610236832. Its totient is φ = 2608042272.

The previous prime is 2609139539. The next prime is 2609139553. The reversal of 2609139551 is 1559319062.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2609139551 - 2¹⁰ = 2609138527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2609139499 and 2609139508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2609139553) 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, 545066 + ... + 549831.

It is an arithmetic number, because the mean of its divisors is an integer number (652559208).

Almost surely, 2^2609139551 is an apocalyptic number.

2609139551 is a deficient number, since it is larger than the sum of its proper divisors (1097281).

2609139551 is a wasteful number, since it uses less digits than its factorization.

2609139551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097280.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 2609139551 is about 51079.7371860897. The cubic root of 2609139551 is about 1376.6782023187.

The spelling of 2609139551 in words is "two billion, six hundred nine million, one hundred thirty-nine thousand, five hundred fifty-one".