2613660426 has 128 divisors (see below), whose sum is σ = 6382817280. Its totient is φ = 787968000.

The previous prime is 2613660397. The next prime is 2613660433. The reversal of 2613660426 is 6240663162.

2613660426 is a `hidden beast` number, since 26 + 1 + 3 + 6 + 604 + 26 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13542186 + ... + 13542378.

It is an arithmetic number, because the mean of its divisors is an integer number (49865760).

Almost surely, 2^2613660426 is an apocalyptic number.

2613660426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2613660426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3191408640).

2613660426 is an abundant number, since it is smaller than the sum of its proper divisors (3769156854).

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

2613660426 is a wasteful number, since it uses less digits than its factorization.

2613660426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 2613660426 is about 51123.9711485718. The cubic root of 2613660426 is about 1377.4728702841.

The spelling of 2613660426 in words is "two billion, six hundred thirteen million, six hundred sixty thousand, four hundred twenty-six".