5071637540661 has 4 divisors (see below), whose sum is σ = 6762183387552. Its totient is φ = 3381091693772.

The previous prime is 5071637540657. The next prime is 5071637540681. The reversal of 5071637540661 is 1660457361705.

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 5071637540661 - 2² = 5071637540657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5071637540681) 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, 845272923441 + ... + 845272923446.

It is an arithmetic number, because the mean of its divisors is an integer number (1690545846888).

Almost surely, 2^{5071637540661} is an apocalyptic number.

It is an amenable number.

5071637540661 is a deficient number, since it is larger than the sum of its proper divisors (1690545846891).

5071637540661 is a wasteful number, since it uses less digits than its factorization.

5071637540661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690545846890.

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 5071637540661 in words is "five trillion, seventy-one billion, six hundred thirty-seven million, five hundred forty thousand, six hundred sixty-one".