161089379537 has 8 divisors (see below), whose sum is σ = 165053482440. Its totient is φ = 157126947840.

The previous prime is 161089379531. The next prime is 161089379557. The reversal of 161089379537 is 735973980161.

It can be written as a sum of positive squares in 4 ways, for example, as 28623225856 + 132466153681 = 169184^2 + 363959^2 .

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 161089379537 - 2¹² = 161089375441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161089379531) 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, 221528 + ... + 609305.

It is an arithmetic number, because the mean of its divisors is an integer number (20631685305).

Almost surely, 2^161089379537 is an apocalyptic number.

It is an amenable number.

161089379537 is a deficient number, since it is larger than the sum of its proper divisors (3964102903).

161089379537 is an equidigital number, since it uses as much as digits as its factorization.

161089379537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835603.

The product of its (nonzero) digits is 8573040, while the sum is 59.

The spelling of 161089379537 in words is "one hundred sixty-one billion, eighty-nine million, three hundred seventy-nine thousand, five hundred thirty-seven".