161375735226637 has 4 divisors (see below), whose sum is σ = 162050947508160. Its totient is φ = 160700522945116.

The previous prime is 161375735226533. The next prime is 161375735226659. The reversal of 161375735226637 is 736622537573161.

161375735226637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161375735226637 - 2³¹ = 161373587742989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161375735226037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337606140403 + ... + 337606140880.

It is an arithmetic number, because the mean of its divisors is an integer number (40512736877040).

Almost surely, 2^{161375735226637} is an apocalyptic number.

It is an amenable number.

161375735226637 is a deficient number, since it is larger than the sum of its proper divisors (675212281523).

161375735226637 is an equidigital number, since it uses as much as digits as its factorization.

161375735226637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675212281522.

The product of its digits is 200037600, while the sum is 64.

The spelling of 161375735226637 in words is "one hundred sixty-one trillion, three hundred seventy-five billion, seven hundred thirty-five million, two hundred twenty-six thousand, six hundred thirty-seven".