161535209456 has 10 divisors (see below), whose sum is σ = 312974468352. Its totient is φ = 80767604720.

The previous prime is 161535209387. The next prime is 161535209461. The reversal of 161535209456 is 654902535161.

It is a self number, because there is not a number n which added to its sum of digits gives 161535209456.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5047975280 + ... + 5047975311.

Almost surely, 2^161535209456 is an apocalyptic number.

161535209456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161535209456 is a deficient number, since it is larger than the sum of its proper divisors (151439258896).

161535209456 is a wasteful number, since it uses less digits than its factorization.

161535209456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10095950599 (or 10095950593 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 161535209456 in words is "one hundred sixty-one billion, five hundred thirty-five million, two hundred nine thousand, four hundred fifty-six".