172621059285 has 16 divisors (see below), whose sum is σ = 279977171904. Its totient is φ = 90803405952.

The previous prime is 172621059263. The next prime is 172621059313. The reversal of 172621059285 is 582950126271.

It is not a de Polignac number, because 172621059285 - 2¹¹ = 172621057237 is a prime.

It is a super-2 number, since 2×172621059285² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78821307 + ... + 78823496.

It is an arithmetic number, because the mean of its divisors is an integer number (17498573244).

Almost surely, 2^172621059285 is an apocalyptic number.

172621059285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172621059285 is a deficient number, since it is larger than the sum of its proper divisors (107356112619).

172621059285 is a wasteful number, since it uses less digits than its factorization.

172621059285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157644884.

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 172621059285 in words is "one hundred seventy-two billion, six hundred twenty-one million, fifty-nine thousand, two hundred eighty-five".