126636544 has 20 divisors (see below), whose sum is σ = 253026774. Its totient is φ = 63318016.

The previous prime is 126636541. The next prime is 126636547. The reversal of 126636544 is 445636621.

It is an interprime number because it is at equal distance from previous prime (126636541) and next prime (126636547).

It can be written as a sum of positive squares in only one way, i.e., 105842944 + 20793600 = 10288^2 + 4560^2 .

It is not an unprimeable number, because it can be changed into a prime (126636541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123157 + ... + 124180.

Almost surely, 2^126636544 is an apocalyptic number.

It is an amenable number.

126636544 is a deficient number, since it is larger than the sum of its proper divisors (126390230).

126636544 is an frugal number, since it uses more digits than its factorization.

126636544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247355 (or 247339 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The square root of 126636544 is about 11253.2903632671. The cubic root of 126636544 is about 502.1726045719.

The spelling of 126636544 in words is "one hundred twenty-six million, six hundred thirty-six thousand, five hundred forty-four".