7387647081 has 16 divisors (see below), whose sum is σ = 10288650240. Its totient is φ = 4706295440.

The previous prime is 7387647077. The next prime is 7387647083. The reversal of 7387647081 is 1807467837.

It is a cyclic number.

It is not a de Polignac number, because 7387647081 - 2² = 7387647077 is a prime.

It is a super-2 number, since 2×7387647081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7387647083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17776 + ... + 122846.

It is an arithmetic number, because the mean of its divisors is an integer number (643040640).

Almost surely, 2^7387647081 is an apocalyptic number.

It is an amenable number.

7387647081 is a deficient number, since it is larger than the sum of its proper divisors (2901003159).

7387647081 is a wasteful number, since it uses less digits than its factorization.

7387647081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106116.

The product of its (nonzero) digits is 1580544, while the sum is 51.

The square root of 7387647081 is about 85951.4227979968. The cubic root of 7387647081 is about 1947.6102288197.

The spelling of 7387647081 in words is "seven billion, three hundred eighty-seven million, six hundred forty-seven thousand, eighty-one".