137172214354661 has 4 divisors (see below), whose sum is σ = 137172775096812. Its totient is φ = 137171653612512.

The previous prime is 137172214354657. The next prime is 137172214354823. The reversal of 137172214354661 is 166453412271731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38580322225636 + 98591892129025 = 6211306^2 + 9929345^2 .

It is a cyclic number.

It is not a de Polignac number, because 137172214354661 - 2² = 137172214354657 is a prime.

It is a super-2 number, since 2×137172214354661² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137172214354561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280003976 + ... + 280493441.

It is an arithmetic number, because the mean of its divisors is an integer number (34293193774203).

Almost surely, 2^{137172214354661} is an apocalyptic number.

It is an amenable number.

137172214354661 is a deficient number, since it is larger than the sum of its proper divisors (560742151).

137172214354661 is an equidigital number, since it uses as much as digits as its factorization.

137172214354661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560742150.

The product of its digits is 5080320, while the sum is 53.

The spelling of 137172214354661 in words is "one hundred thirty-seven trillion, one hundred seventy-two billion, two hundred fourteen million, three hundred fifty-four thousand, six hundred sixty-one".