47503558661 has 4 divisors (see below), whose sum is σ = 51157678572. Its totient is φ = 43849438752.

The previous prime is 47503558607. The next prime is 47503558667. The reversal of 47503558661 is 16685530574.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26534781025 + 20968777636 = 162895^2 + 144806^2 .

It is a cyclic number.

It is not a de Polignac number, because 47503558661 - 2²² = 47499364357 is a prime.

It is a super-2 number, since 2×47503558661² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47503558667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1827059936 + ... + 1827059961.

It is an arithmetic number, because the mean of its divisors is an integer number (12789419643).

Almost surely, 2^47503558661 is an apocalyptic number.

It is an amenable number.

47503558661 is a deficient number, since it is larger than the sum of its proper divisors (3654119911).

47503558661 is a wasteful number, since it uses less digits than its factorization.

47503558661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654119910.

The product of its (nonzero) digits is 3024000, while the sum is 50.

The spelling of 47503558661 in words is "forty-seven billion, five hundred three million, five hundred fifty-eight thousand, six hundred sixty-one".