126985488639 has 16 divisors (see below), whose sum is σ = 171714380544. Its totient is φ = 83457012800.

The previous prime is 126985488583. The next prime is 126985488673. The reversal of 126985488639 is 936884589621.

It is a cyclic number.

It is not a de Polignac number, because 126985488639 - 2³³ = 118395554047 is a prime.

It is a super-2 number, since 2×126985488639² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126985488689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3209632 + ... + 3248954.

It is an arithmetic number, because the mean of its divisors is an integer number (10732148784).

Almost surely, 2^126985488639 is an apocalyptic number.

126985488639 is a deficient number, since it is larger than the sum of its proper divisors (44728891905).

126985488639 is a wasteful number, since it uses less digits than its factorization.

126985488639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54558.

The product of its digits is 179159040, while the sum is 69.

The spelling of 126985488639 in words is "one hundred twenty-six billion, nine hundred eighty-five million, four hundred eighty-eight thousand, six hundred thirty-nine".