2609742258 has 18 divisors (see below), whose sum is σ = 5654911197. Its totient is φ = 869841840.

The previous prime is 2609742253. The next prime is 2609742271. The reversal of 2609742258 is 8522479062.

It can be written as a sum of positive squares in 2 ways, for example, as 2561675769 + 48066489 = 50613^2 + 6933^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=36123.

It is not an unprimeable number, because it can be changed into a prime (2609742253) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 210718 + ... + 222758.

Almost surely, 2^2609742258 is an apocalyptic number.

2609742258 is an abundant number, since it is smaller than the sum of its proper divisors (3045168939).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2609742258 is an frugal number, since it uses more digits than its factorization.

2609742258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24090 (or 12046 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 2609742258 is about 51085.6365136033. The cubic root of 2609742258 is about 1376.7841976340.

The spelling of 2609742258 in words is "two billion, six hundred nine million, seven hundred forty-two thousand, two hundred fifty-eight".