2975991081 has 8 divisors (see below), whose sum is σ = 4534843584. Its totient is φ = 1700566320.

The previous prime is 2975991077. The next prime is 2975991089. The reversal of 2975991081 is 1801995792.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2975991081 - 2² = 2975991077 is a prime.

It is a super-2 number, since 2×2975991081² = 17713045828383097122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2975991089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70856910 + ... + 70856951.

It is an arithmetic number, because the mean of its divisors is an integer number (566855448).

Almost surely, 2^2975991081 is an apocalyptic number.

2975991081 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2975991081 is a deficient number, since it is larger than the sum of its proper divisors (1558852503).

2975991081 is a wasteful number, since it uses less digits than its factorization.

2975991081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141713871.

The product of its (nonzero) digits is 408240, while the sum is 51.

The square root of 2975991081 is about 54552.6450412810. The cubic root of 2975991081 is about 1438.3918326849.

The spelling of 2975991081 in words is "two billion, nine hundred seventy-five million, nine hundred ninety-one thousand, eighty-one".