161611515150 has 48 divisors (see below), whose sum is σ = 400889345904. Its totient is φ = 43086426880.

The previous prime is 161611515127. The next prime is 161611515151. The reversal of 161611515150 is 51515116161.

161611515150 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161611515150² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161611515151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 537034 + ... + 782066.

It is an arithmetic number, because the mean of its divisors is an integer number (8351861373).

Almost surely, 2^161611515150 is an apocalyptic number.

161611515150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161611515150 is an abundant number, since it is smaller than the sum of its proper divisors (239277830754).

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

161611515150 is a wasteful number, since it uses less digits than its factorization.

161611515150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249445 (or 249440 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 33.

The spelling of 161611515150 in words is "one hundred sixty-one billion, six hundred eleven million, five hundred fifteen thousand, one hundred fifty".