161301921915 has 8 divisors (see below), whose sum is σ = 258083075088. Its totient is φ = 86027691680.

The previous prime is 161301921853. The next prime is 161301921923. The reversal of 161301921915 is 519129103161.

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

It is not a de Polignac number, because 161301921915 - 2⁷ = 161301921787 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5376730716 + ... + 5376730745.

It is an arithmetic number, because the mean of its divisors is an integer number (32260384386).

Almost surely, 2^161301921915 is an apocalyptic number.

161301921915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161301921915 is a deficient number, since it is larger than the sum of its proper divisors (96781153173).

161301921915 is a wasteful number, since it uses less digits than its factorization.

161301921915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10753461469.

The product of its (nonzero) digits is 14580, while the sum is 39.

The spelling of 161301921915 in words is "one hundred sixty-one billion, three hundred one million, nine hundred twenty-one thousand, nine hundred fifteen".