161137603393 has 8 divisors (see below), whose sum is σ = 173567979648. Its totient is φ = 148712252304.

The previous prime is 161137603391. The next prime is 161137603507. The reversal of 161137603393 is 393306731161.

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

It is a cyclic number.

It is not a de Polignac number, because 161137603393 - 2¹ = 161137603391 is a prime.

It is a super-2 number, since 2×161137603393² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161137603391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1189555 + ... + 1318072.

It is an arithmetic number, because the mean of its divisors is an integer number (21695997456).

Almost surely, 2^161137603393 is an apocalyptic number.

161137603393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161137603393 is a deficient number, since it is larger than the sum of its proper divisors (12430376255).

161137603393 is a wasteful number, since it uses less digits than its factorization.

161137603393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512583.

The product of its (nonzero) digits is 183708, while the sum is 43.

The spelling of 161137603393 in words is "one hundred sixty-one billion, one hundred thirty-seven million, six hundred three thousand, three hundred ninety-three".