7581912945 has 32 divisors (see below), whose sum is σ = 12263892480. Its totient is φ = 3999494400.

The previous prime is 7581912929. The next prime is 7581912973. The reversal of 7581912945 is 5492191857.

It is not a de Polignac number, because 7581912945 - 2⁴ = 7581912929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1932696 + ... + 1936614.

It is an arithmetic number, because the mean of its divisors is an integer number (383246640).

Almost surely, 2^7581912945 is an apocalyptic number.

It is an amenable number.

7581912945 is a deficient number, since it is larger than the sum of its proper divisors (4681979535).

7581912945 is a wasteful number, since it uses less digits than its factorization.

7581912945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305.

The product of its digits is 907200, while the sum is 51.

The square root of 7581912945 is about 87074.1807024333. The cubic root of 7581912945 is about 1964.5342187318.

It can be divided in two parts, 7581912 and 945, that added together give a palindrome (7582857).

The spelling of 7581912945 in words is "seven billion, five hundred eighty-one million, nine hundred twelve thousand, nine hundred forty-five".