7144137661 has 8 divisors (see below), whose sum is σ = 7269804000. Its totient is φ = 7018624080.

The previous prime is 7144137629. The next prime is 7144137667. The reversal of 7144137661 is 1667314417.

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

It is a cyclic number.

It is not a de Polignac number, because 7144137661 - 2⁵ = 7144137629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7144137667) 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, 58290 + ... + 132988.

It is an arithmetic number, because the mean of its divisors is an integer number (908725500).

Almost surely, 2^7144137661 is an apocalyptic number.

It is an amenable number.

7144137661 is a deficient number, since it is larger than the sum of its proper divisors (125666339).

7144137661 is a wasteful number, since it uses less digits than its factorization.

7144137661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76379.

The product of its digits is 84672, while the sum is 40.

The square root of 7144137661 is about 84523.0007808525. Note that the first 3 decimals coincide. The cubic root of 7144137661 is about 1925.9718630902.

The spelling of 7144137661 in words is "seven billion, one hundred forty-four million, one hundred thirty-seven thousand, six hundred sixty-one".