55288808661 has 8 divisors (see below), whose sum is σ = 73721675104. Its totient is φ = 36857574000.

The previous prime is 55288808629. The next prime is 55288808677. The reversal of 55288808661 is 16680888255.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55288808661 - 2⁵ = 55288808629 is a prime.

It is a super-2 number, since 2×55288808661² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55288808261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326566 + ... + 466071.

It is an arithmetic number, because the mean of its divisors is an integer number (9215209388).

Almost surely, 2^55288808661 is an apocalyptic number.

It is an amenable number.

55288808661 is a deficient number, since it is larger than the sum of its proper divisors (18432866443).

55288808661 is a wasteful number, since it uses less digits than its factorization.

55288808661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815891.

The product of its (nonzero) digits is 7372800, while the sum is 57.

The spelling of 55288808661 in words is "fifty-five billion, two hundred eighty-eight million, eight hundred eight thousand, six hundred sixty-one".