7949494081 has 4 divisors (see below), whose sum is σ = 7949729200. Its totient is φ = 7949258964.

The previous prime is 7949494051. The next prime is 7949494153. The reversal of 7949494081 is 1804949497.

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.

It is a cyclic number.

It is not a de Polignac number, because 7949494081 - 2¹⁵ = 7949461313 is a prime.

It is a super-2 number, since 2×7949494081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7949494001) 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, 56151 + ... + 138028.

It is an arithmetic number, because the mean of its divisors is an integer number (1987432300).

Almost surely, 2^7949494081 is an apocalyptic number.

It is an amenable number.

7949494081 is a deficient number, since it is larger than the sum of its proper divisors (235119).

7949494081 is a wasteful number, since it uses less digits than its factorization.

7949494081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235118.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The square root of 7949494081 is about 89159.9354026235. The cubic root of 7949494081 is about 1995.7822851097.

The spelling of 7949494081 in words is "seven billion, nine hundred forty-nine million, four hundred ninety-four thousand, eighty-one".