2046978991979 has 4 divisors (see below), whose sum is σ = 2051400113376. Its totient is φ = 2042557870584.

The previous prime is 2046978991969. The next prime is 2046978992011. The reversal of 2046978991979 is 9791998796402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2046978991979 - 2⁴⁰ = 947467364203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2046978991969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2210560004 + ... + 2210560929.

It is an arithmetic number, because the mean of its divisors is an integer number (512850028344).

Almost surely, 2^{2046978991979} is an apocalyptic number.

2046978991979 is a deficient number, since it is larger than the sum of its proper divisors (4421121397).

2046978991979 is an equidigital number, since it uses as much as digits as its factorization.

2046978991979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421121396.

The product of its (nonzero) digits is 1111065984, while the sum is 80.

The spelling of 2046978991979 in words is "two trillion, forty-six billion, nine hundred seventy-eight million, nine hundred ninety-one thousand, nine hundred seventy-nine".