47559977661 has 64 divisors (see below), whose sum is σ = 78028544000. Its totient is φ = 25685589888.

The previous prime is 47559977659. The next prime is 47559977687. The reversal of 47559977661 is 16677995574.

It is not a de Polignac number, because 47559977661 - 2¹ = 47559977659 is a prime.

It is a super-2 number, since 2×47559977661² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 47559977592 and 47559977601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47559927661) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8932146 + ... + 8937468.

It is an arithmetic number, because the mean of its divisors is an integer number (1219196000).

Almost surely, 2^47559977661 is an apocalyptic number.

It is an amenable number.

47559977661 is a deficient number, since it is larger than the sum of its proper divisors (30468566339).

47559977661 is a wasteful number, since it uses less digits than its factorization.

47559977661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5823 (or 5809 counting only the distinct ones).

The product of its digits is 100018800, while the sum is 66.

The spelling of 47559977661 in words is "forty-seven billion, five hundred fifty-nine million, nine hundred seventy-seven thousand, six hundred sixty-one".