70172362500021 has 96 divisors (see below), whose sum is σ = 109457429713632. Its totient is φ = 43158974791680.

The previous prime is 70172362500001. The next prime is 70172362500029. The reversal of 70172362500021 is 12000526327107.

70172362500021 is a `hidden beast` number, since 7 + 0 + 1 + 7 + 2 + 3 + 625 + 0 + 0 + 0 + 21 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 3617946368100 + 66554416131921 = 1902090^2 + 8158089^2 .

It is not a de Polignac number, because 70172362500021 - 2¹⁹ = 70172361975733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70172362500029) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 5058189741 + ... + 5058203613.

It is an arithmetic number, because the mean of its divisors is an integer number (1140181559517).

Almost surely, 2^{70172362500021} is an apocalyptic number.

It is an amenable number.

70172362500021 is a deficient number, since it is larger than the sum of its proper divisors (39285067213611).

70172362500021 is a wasteful number, since it uses less digits than its factorization.

70172362500021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15783 (or 15780 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

Adding to 70172362500021 its reverse (12000526327107), we get a palindrome (82172888827128).

The spelling of 70172362500021 in words is "seventy trillion, one hundred seventy-two billion, three hundred sixty-two million, five hundred thousand, twenty-one".