7980256949 has 4 divisors (see below), whose sum is σ = 9120293664. Its totient is φ = 6840220236.

The previous prime is 7980256927. The next prime is 7980256957. The reversal of 7980256949 is 9496520897.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9496520897 = 401 ⋅23682097.

It is a cyclic number.

It is not a de Polignac number, because 7980256949 - 2¹² = 7980252853 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 (7980256979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570018347 + ... + 570018360.

It is an arithmetic number, because the mean of its divisors is an integer number (2280073416).

Almost surely, 2^7980256949 is an apocalyptic number.

It is an amenable number.

7980256949 is a deficient number, since it is larger than the sum of its proper divisors (1140036715).

7980256949 is a wasteful number, since it uses less digits than its factorization.

7980256949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140036714.

The product of its (nonzero) digits is 9797760, while the sum is 59.

The square root of 7980256949 is about 89332.2839123684. The cubic root of 7980256949 is about 1998.3533904606.

The spelling of 7980256949 in words is "seven billion, nine hundred eighty million, two hundred fifty-six thousand, nine hundred forty-nine".