1306500426638 has 16 divisors (see below), whose sum is σ = 2178247711536. Its totient is φ = 582658851840.

The previous prime is 1306500426601. The next prime is 1306500426653. The reversal of 1306500426638 is 8366240056031.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560247731 + ... + 560250062.

It is an arithmetic number, because the mean of its divisors is an integer number (136140481971).

Almost surely, 2^{1306500426638} is an apocalyptic number.

1306500426638 is a deficient number, since it is larger than the sum of its proper divisors (871747284898).

1306500426638 is a wasteful number, since it uses less digits than its factorization.

1306500426638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120497859.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 1306500426638 in words is "one trillion, three hundred six billion, five hundred million, four hundred twenty-six thousand, six hundred thirty-eight".