109126497649 has 9 divisors (see below), whose sum is σ = 118171212939. Its totient is φ = 100728187560.

The previous prime is 109126497643. The next prime is 109126497653. The reversal of 109126497649 is 946794621901.

The square root of 109126497649 is 330343.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 16142973025 + 92983524624 = 127055^2 + 304932^2 .

It is a de Polignac number, because none of the positive numbers 2^k-109126497649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 109126497593 and 109126497602.

It is not an unprimeable number, because it can be changed into a prime (109126497643) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4281754 + ... + 4307164.

It is an arithmetic number, because the mean of its divisors is an integer number (13130134771).

Almost surely, 2^109126497649 is an apocalyptic number.

109126497649 is the 330343-rd square number.

109126497649 is the 165172-nd centered octagonal number.

It is an amenable number.

109126497649 is a deficient number, since it is larger than the sum of its proper divisors (9044715290).

109126497649 is an frugal number, since it uses more digits than its factorization.

109126497649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50848 (or 25424 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 109126497649 in words is "one hundred nine billion, one hundred twenty-six million, four hundred ninety-seven thousand, six hundred forty-nine".