161613028262550 has 48 divisors (see below), whose sum is σ = 400804798726080. Its totient is φ = 43096324887840.

The previous prime is 161613028262507. The next prime is 161613028262561. The reversal of 161613028262550 is 55262820316161.

It is a super-2 number, since 2×161613028262550² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161613028262550.

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, 7506321 + ... + 19482579.

It is an arithmetic number, because the mean of its divisors is an integer number (8350099973460).

Almost surely, 2^{161613028262550} is an apocalyptic number.

161613028262550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161613028262550 is an abundant number, since it is smaller than the sum of its proper divisors (239191770463530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161613028262550 is a wasteful number, since it uses less digits than its factorization.

161613028262550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12066237 (or 12066232 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 161613028262550 in words is "one hundred sixty-one trillion, six hundred thirteen billion, twenty-eight million, two hundred sixty-two thousand, five hundred fifty".