161246377425 has 48 divisors (see below), whose sum is σ = 322601173632. Its totient is φ = 69376588800.

The previous prime is 161246377423. The next prime is 161246377441. The reversal of 161246377425 is 524773642161.

It is not a de Polignac number, because 161246377425 - 2¹ = 161246377423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161246377423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9024486 + ... + 9042335.

It is an arithmetic number, because the mean of its divisors is an integer number (6720857784).

Almost surely, 2^161246377425 is an apocalyptic number.

161246377425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161246377425 is an abundant number, since it is smaller than the sum of its proper divisors (161354796207).

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

161246377425 is a wasteful number, since it uses less digits than its factorization.

161246377425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18066858 (or 18066853 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 48.

The spelling of 161246377425 in words is "one hundred sixty-one billion, two hundred forty-six million, three hundred seventy-seven thousand, four hundred twenty-five".