4526999981 has 4 divisors (see below), whose sum is σ = 5173714272. Its totient is φ = 3880285692.

The previous prime is 4526999957. The next prime is 4527000007. The reversal of 4526999981 is 1899996254.

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 4526999981 - 2¹⁴ = 4526983597 is a prime.

It is a super-2 number, since 2×4526999981² = 40987457655948000722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4526999941) 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, 323357135 + ... + 323357148.

It is an arithmetic number, because the mean of its divisors is an integer number (1293428568).

Almost surely, 2^4526999981 is an apocalyptic number.

It is an amenable number.

4526999981 is a deficient number, since it is larger than the sum of its proper divisors (646714291).

4526999981 is an equidigital number, since it uses as much as digits as its factorization.

4526999981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646714290.

The product of its digits is 12597120, while the sum is 62.

The square root of 4526999981 is about 67282.9843348227. The cubic root of 4526999981 is about 1654.2589674526.

The spelling of 4526999981 in words is "four billion, five hundred twenty-six million, nine hundred ninety-nine thousand, nine hundred eighty-one".