955537661 has 18 divisors (see below), whose sum is σ = 1050051438. Its totient is φ = 869132160.

The previous prime is 955537651. The next prime is 955537729. The reversal of 955537661 is 166735559.

It can be written as a sum of positive squares in 9 ways, for example, as 336025561 + 619512100 = 18331^2 + 24890^2 .

It is a de Polignac number, because none of the positive numbers 2^k-955537661 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 (955537601) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 900071 + ... + 901131.

It is an arithmetic number, because the mean of its divisors is an integer number (58336191).

Almost surely, 2^955537661 is an apocalyptic number.

It is an amenable number.

955537661 is a deficient number, since it is larger than the sum of its proper divisors (94513777).

955537661 is a wasteful number, since it uses less digits than its factorization.

955537661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233 (or 1147 counting only the distinct ones).

The product of its digits is 850500, while the sum is 47.

The square root of 955537661 is about 30911.7722073646. The cubic root of 955537661 is about 984.9539727864.

The spelling of 955537661 in words is "nine hundred fifty-five million, five hundred thirty-seven thousand, six hundred sixty-one".