172021080715620 has 24 divisors (see below), whose sum is σ = 481659026003904. Its totient is φ = 45872288190816.

The previous prime is 172021080715619. The next prime is 172021080715621. The reversal of 172021080715620 is 26517080120271.

It is an interprime number because it is at equal distance from previous prime (172021080715619) and next prime (172021080715621).

It is not an unprimeable number, because it can be changed into a prime (172021080715621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1433509005904 + ... + 1433509006023.

It is an arithmetic number, because the mean of its divisors is an integer number (20069126083496).

Almost surely, 2^{172021080715620} is an apocalyptic number.

172021080715620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172021080715620 is an abundant number, since it is smaller than the sum of its proper divisors (309637945288284).

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

172021080715620 is a wasteful number, since it uses less digits than its factorization.

172021080715620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867018011939 (or 2867018011937 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 42.

The spelling of 172021080715620 in words is "one hundred seventy-two trillion, twenty-one billion, eighty million, seven hundred fifteen thousand, six hundred twenty".