161501601254 has 96 divisors (see below), whose sum is σ = 296538361344. Its totient is φ = 65697428160.

The previous prime is 161501601251. The next prime is 161501601271. The reversal of 161501601254 is 452106105161.

It is a self number, because there is not a number n which added to its sum of digits gives 161501601254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161501601251) by changing a digit.

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 in 47 ways as a sum of consecutive naturals, for example, 59135069 + ... + 59137799.

It is an arithmetic number, because the mean of its divisors is an integer number (3088941264).

Almost surely, 2^161501601254 is an apocalyptic number.

161501601254 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161501601254 is a deficient number, since it is larger than the sum of its proper divisors (135036760090).

161501601254 is a wasteful number, since it uses less digits than its factorization.

161501601254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3178 (or 3171 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 161501601254 in words is "one hundred sixty-one billion, five hundred one million, six hundred one thousand, two hundred fifty-four".