7151686621 has 16 divisors (see below), whose sum is σ = 7717026240. Its totient is φ = 6605470080.

The previous prime is 7151686609. The next prime is 7151686627. The reversal of 7151686621 is 1266861517.

It is a de Polignac number, because none of the positive numbers 2^k-7151686621 is a prime.

It is a super-3 number, since 3×7151686621³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7151686627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1745251 + ... + 1749343.

It is an arithmetic number, because the mean of its divisors is an integer number (482314140).

Almost surely, 2^7151686621 is an apocalyptic number.

It is an amenable number.

7151686621 is a deficient number, since it is larger than the sum of its proper divisors (565339619).

7151686621 is a wasteful number, since it uses less digits than its factorization.

7151686621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6396.

The product of its digits is 120960, while the sum is 43.

The square root of 7151686621 is about 84567.6452374074. The cubic root of 7151686621 is about 1926.6499932938.

The spelling of 7151686621 in words is "seven billion, one hundred fifty-one million, six hundred eighty-six thousand, six hundred twenty-one".