172419019920 has 120 divisors (see below), whose sum is σ = 661760638656. Its totient is φ = 39410060544.

The previous prime is 172419019919. The next prime is 172419019933. The reversal of 172419019920 is 29910914271.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17100022 + ... + 17110101.

Almost surely, 2^172419019920 is an apocalyptic number.

172419019920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172419019920 is an abundant number, since it is smaller than the sum of its proper divisors (489341618736).

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

172419019920 is a wasteful number, since it uses less digits than its factorization.

172419019920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34210149 (or 34210140 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The spelling of 172419019920 in words is "one hundred seventy-two billion, four hundred nineteen million, nineteen thousand, nine hundred twenty".