2990943561 has 32 divisors (see below), whose sum is σ = 4148564992. Its totient is φ = 1915462080.

The previous prime is 2990943511. The next prime is 2990943607. The reversal of 2990943561 is 1653490992.

It is not a de Polignac number, because 2990943561 - 2⁶ = 2990943497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2990943561.

It is not an unprimeable number, because it can be changed into a prime (2990943511) 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, 2165091 + ... + 2166471.

It is an arithmetic number, because the mean of its divisors is an integer number (129642656).

Almost surely, 2^2990943561 is an apocalyptic number.

It is an amenable number.

2990943561 is a deficient number, since it is larger than the sum of its proper divisors (1157621431).

2990943561 is a wasteful number, since it uses less digits than its factorization.

2990943561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693.

The product of its (nonzero) digits is 524880, while the sum is 48.

The square root of 2990943561 is about 54689.5196632774. The cubic root of 2990943561 is about 1440.7968135409.

The spelling of 2990943561 in words is "two billion, nine hundred ninety million, nine hundred forty-three thousand, five hundred sixty-one".