7351661537 has 4 divisors (see below), whose sum is σ = 8019994416. Its totient is φ = 6683328660.

The previous prime is 7351661521. The next prime is 7351661549.

7351661537 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7351661537 - 2⁴ = 7351661521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7351661567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334166423 + ... + 334166444.

It is an arithmetic number, because the mean of its divisors is an integer number (2004998604).

Almost surely, 2^7351661537 is an apocalyptic number.

It is an amenable number.

7351661537 is a deficient number, since it is larger than the sum of its proper divisors (668332879).

7351661537 is a wasteful number, since it uses less digits than its factorization.

7351661537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668332878.

The product of its digits is 396900, while the sum is 44.

The square root of 7351661537 is about 85741.8307303967. The cubic root of 7351661537 is about 1944.4427828222.

The spelling of 7351661537 in words is "seven billion, three hundred fifty-one million, six hundred sixty-one thousand, five hundred thirty-seven".