161078641 has 4 divisors (see below), whose sum is σ = 161172592. Its totient is φ = 160984692.

The previous prime is 161078639. The next prime is 161078651. The reversal of 161078641 is 146870161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146870161 = 12119².

It is a cyclic number.

It is not a de Polignac number, because 161078641 - 2¹ = 161078639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161078597 and 161078606.

It is not an unprimeable number, because it can be changed into a prime (161078651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44355 + ... + 47848.

It is an arithmetic number, because the mean of its divisors is an integer number (40293148).

Almost surely, 2^161078641 is an apocalyptic number.

It is an amenable number.

161078641 is a deficient number, since it is larger than the sum of its proper divisors (93951).

161078641 is an equidigital number, since it uses as much as digits as its factorization.

161078641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93950.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 161078641 is about 12691.6760516490. The cubic root of 161078641 is about 544.1007429935.

The spelling of 161078641 in words is "one hundred sixty-one million, seventy-eight thousand, six hundred forty-one".