2606945978 has 32 divisors (see below), whose sum is σ = 4816955136. Its totient is φ = 1030434048.

The previous prime is 2606945953. The next prime is 2606945983. The reversal of 2606945978 is 8795496062.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231650 + ... + 242642.

It is an arithmetic number, because the mean of its divisors is an integer number (150529848).

Almost surely, 2^2606945978 is an apocalyptic number.

2606945978 is a deficient number, since it is larger than the sum of its proper divisors (2210009158).

2606945978 is a wasteful number, since it uses less digits than its factorization.

2606945978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12318.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The square root of 2606945978 is about 51058.2606245062. The cubic root of 2606945978 is about 1376.2922908258.

The spelling of 2606945978 in words is "two billion, six hundred six million, nine hundred forty-five thousand, nine hundred seventy-eight".