7639440137 has 8 divisors (see below), whose sum is σ = 8732809536. Its totient is φ = 6546575952.

The previous prime is 7639440131. The next prime is 7639440191. The reversal of 7639440137 is 7310449367.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7639440137 - 2⁸ = 7639439881 is a prime.

It is a super-2 number, since 2×7639440137² (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 (7639440131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93323 + ... + 154880.

It is an arithmetic number, because the mean of its divisors is an integer number (1091601192).

Almost surely, 2^7639440137 is an apocalyptic number.

It is an amenable number.

7639440137 is a deficient number, since it is larger than the sum of its proper divisors (1093369399).

7639440137 is a wasteful number, since it uses less digits than its factorization.

7639440137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252607.

The product of its (nonzero) digits is 381024, while the sum is 44.

The square root of 7639440137 is about 87403.8908573297. The cubic root of 7639440137 is about 1969.4902901982.

The spelling of 7639440137 in words is "seven billion, six hundred thirty-nine million, four hundred forty thousand, one hundred thirty-seven".