172420603011 has 24 divisors (see below), whose sum is σ = 262403471616. Its totient is φ = 108881886960.

The previous prime is 172420602947. The next prime is 172420603087. The reversal of 172420603011 is 110306024271.

172420603011 is a `hidden beast` number, since 1 + 7 + 2 + 42 + 0 + 603 + 0 + 11 = 666.

It is not a de Polignac number, because 172420603011 - 2⁶ = 172420602947 is a prime.

It is a super-2 number, since 2×172420603011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172420603111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4022125 + ... + 4064766.

It is an arithmetic number, because the mean of its divisors is an integer number (10933477984).

Almost surely, 2^172420603011 is an apocalyptic number.

172420603011 is a deficient number, since it is larger than the sum of its proper divisors (89982868605).

172420603011 is a wasteful number, since it uses less digits than its factorization.

172420603011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8087023 (or 8087020 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

Adding to 172420603011 its reverse (110306024271), we get a palindrome (282726627282).

The spelling of 172420603011 in words is "one hundred seventy-two billion, four hundred twenty million, six hundred three thousand, eleven".