7520454081 has 24 divisors (see below), whose sum is σ = 12417491840. Its totient is φ = 4296442176.

The previous prime is 7520454077. The next prime is 7520454167. The reversal of 7520454081 is 1804540257.

7520454081 is a `hidden beast` number, since 7 + 520 + 4 + 54 + 0 + 81 = 666.

It is not a de Polignac number, because 7520454081 - 2² = 7520454077 is a prime.

It is a super-2 number, since 2×7520454081² (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 (7520454001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 347916 + ... + 368898.

Almost surely, 2^7520454081 is an apocalyptic number.

It is an amenable number.

7520454081 is a deficient number, since it is larger than the sum of its proper divisors (4897037759).

7520454081 is a wasteful number, since it uses less digits than its factorization.

7520454081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26685 (or 26682 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 7520454081 is about 86720.5516645276. The cubic root of 7520454081 is about 1959.2116502757.

The spelling of 7520454081 in words is "seven billion, five hundred twenty million, four hundred fifty-four thousand, eighty-one".