2607981509749 has 32 divisors (see below), whose sum is σ = 3304702550016. Its totient is φ = 1999198609920.

The previous prime is 2607981509747. The next prime is 2607981509753. The reversal of 2607981509749 is 9479051897062.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2607981509749 - 2¹ = 2607981509747 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2607981509747) 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, 201892 + ... + 2292754.

It is an arithmetic number, because the mean of its divisors is an integer number (103271954688).

Almost surely, 2^{2607981509749} is an apocalyptic number.

It is an amenable number.

2607981509749 is a deficient number, since it is larger than the sum of its proper divisors (696721040267).

2607981509749 is a wasteful number, since it uses less digits than its factorization.

2607981509749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091145.

The product of its (nonzero) digits is 68584320, while the sum is 67.

The spelling of 2607981509749 in words is "two trillion, six hundred seven billion, nine hundred eighty-one million, five hundred nine thousand, seven hundred forty-nine".