1161658888550 has 48 divisors (see below), whose sum is σ = 2166613952832. Its totient is φ = 463389981600.

The previous prime is 1161658888513. The next prime is 1161658888573. The reversal of 1161658888550 is 558888561611.

It is a super-2 number, since 2×1161658888550² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36391697 + ... + 36423603.

It is an arithmetic number, because the mean of its divisors is an integer number (45137790684).

Almost surely, 2^{1161658888550} is an apocalyptic number.

1161658888550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161658888550 is a deficient number, since it is larger than the sum of its proper divisors (1004955064282).

1161658888550 is a wasteful number, since it uses less digits than its factorization.

1161658888550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33893 (or 33888 counting only the distinct ones).

The product of its (nonzero) digits is 18432000, while the sum is 62.

The spelling of 1161658888550 in words is "one trillion, one hundred sixty-one billion, six hundred fifty-eight million, eight hundred eighty-eight thousand, five hundred fifty".