1161650011550 has 48 divisors (see below), whose sum is σ = 2554485564960. Its totient is φ = 384546207360.

The previous prime is 1161650011549. The next prime is 1161650011601. The reversal of 1161650011550 is 551100561611.

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, 57213989 + ... + 57234288.

It is an arithmetic number, because the mean of its divisors is an integer number (53218449270).

Almost surely, 2^{1161650011550} is an apocalyptic number.

1161650011550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161650011550 is an abundant number, since it is smaller than the sum of its proper divisors (1392835553410).

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

1161650011550 is a wasteful number, since it uses less digits than its factorization.

1161650011550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114448325 (or 114448320 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 1161650011550 in words is "one trillion, one hundred sixty-one billion, six hundred fifty million, eleven thousand, five hundred fifty".