106156561657 has 4 divisors (see below), whose sum is σ = 109025657956. Its totient is φ = 103287465360.

The previous prime is 106156561633. The next prime is 106156561691. The reversal of 106156561657 is 756165651601.

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 42078727161 + 64077834496 = 205131^2 + 253136^2 .

It is a cyclic number.

It is not a de Polignac number, because 106156561657 - 2¹⁹ = 106156037369 is a prime.

It is a super-2 number, since 2×106156561657² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 106156561657.

It is not an unprimeable number, because it can be changed into a prime (106156561457) 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, 1434548094 + ... + 1434548167.

It is an arithmetic number, because the mean of its divisors is an integer number (27256414489).

Almost surely, 2^106156561657 is an apocalyptic number.

It is an amenable number.

106156561657 is a deficient number, since it is larger than the sum of its proper divisors (2869096299).

106156561657 is an equidigital number, since it uses as much as digits as its factorization.

106156561657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869096298.

The product of its (nonzero) digits is 1134000, while the sum is 49.

The spelling of 106156561657 in words is "one hundred six billion, one hundred fifty-six million, five hundred sixty-one thousand, six hundred fifty-seven".