161980415 has 32 divisors (see below), whose sum is σ = 210124800. Its totient is φ = 119508480.

The previous prime is 161980387. The next prime is 161980439. The reversal of 161980415 is 514089161.

It is a de Polignac number, because none of the positive numbers 2^k-161980415 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 847970 + ... + 848160.

It is an arithmetic number, because the mean of its divisors is an integer number (6566400).

Almost surely, 2^161980415 is an apocalyptic number.

161980415 is a deficient number, since it is larger than the sum of its proper divisors (48144385).

161980415 is a wasteful number, since it uses less digits than its factorization.

161980415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 161980415 is about 12727.1526666415. The cubic root of 161980415 is about 545.1142088737.

The spelling of 161980415 in words is "one hundred sixty-one million, nine hundred eighty thousand, four hundred fifteen".