162721508225780 has 48 divisors (see below), whose sum is σ = 411085915524480. Its totient is φ = 52853903422848.

The previous prime is 162721508225743. The next prime is 162721508225873. The reversal of 162721508225780 is 87522805127261.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30586747007 + ... + 30586752326.

It is an arithmetic number, because the mean of its divisors is an integer number (8564289906760).

Almost surely, 2^{162721508225780} is an apocalyptic number.

162721508225780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

162721508225780 is an abundant number, since it is smaller than the sum of its proper divisors (248364407298700).

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

162721508225780 is a wasteful number, since it uses less digits than its factorization.

162721508225780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61173499368 (or 61173499366 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 56.

The spelling of 162721508225780 in words is "one hundred sixty-two trillion, seven hundred twenty-one billion, five hundred eight million, two hundred twenty-five thousand, seven hundred eighty".