2608781607 has 32 divisors (see below), whose sum is σ = 3998086400. Its totient is φ = 1679919264.

The previous prime is 2608781603. The next prime is 2608781611. The reversal of 2608781607 is 7061878062.

It is an interprime number because it is at equal distance from previous prime (2608781603) and next prime (2608781611).

It is not a de Polignac number, because 2608781607 - 2² = 2608781603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2608781603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129468 + ... + 148254.

It is an arithmetic number, because the mean of its divisors is an integer number (124940200).

Almost surely, 2^2608781607 is an apocalyptic number.

2608781607 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2608781607 is a deficient number, since it is larger than the sum of its proper divisors (1389304793).

2608781607 is a wasteful number, since it uses less digits than its factorization.

2608781607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18972 (or 18966 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 2608781607 is about 51076.2332890749. The cubic root of 2608781607 is about 1376.6152446234.

The spelling of 2608781607 in words is "two billion, six hundred eight million, seven hundred eighty-one thousand, six hundred seven".