7162581640 has 16 divisors (see below), whose sum is σ = 16115808780. Its totient is φ = 2865032640.

The previous prime is 7162581607. The next prime is 7162581659. The reversal of 7162581640 is 461852617.

It can be written as a sum of positive squares in 2 ways, for example, as 6607413796 + 555167844 = 81286^2 + 23562^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 179064541 = 7162581640 / (7 + 1 + 6 + 2 + 5 + 8 + 1 + 6 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 7162581593 and 7162581602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89532231 + ... + 89532310.

Almost surely, 2^7162581640 is an apocalyptic number.

It is an amenable number.

7162581640 is an abundant number, since it is smaller than the sum of its proper divisors (8953227140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7162581640 is a wasteful number, since it uses less digits than its factorization.

7162581640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179064552 (or 179064548 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 7162581640 is about 84632.0367236899. The cubic root of 7162581640 is about 1927.6278622963.

The spelling of 7162581640 in words is "seven billion, one hundred sixty-two million, five hundred eighty-one thousand, six hundred forty".