126939472865 has 32 divisors (see below), whose sum is σ = 155828883456. Its totient is φ = 99241032960.

The previous prime is 126939472817. The next prime is 126939472873. The reversal of 126939472865 is 568274939621.

It is not a de Polignac number, because 126939472865 - 2¹⁴ = 126939456481 is a prime.

It is a super-2 number, since 2×126939472865² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126939472798 and 126939472807.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32355794 + ... + 32359716.

It is an arithmetic number, because the mean of its divisors is an integer number (4869652608).

Almost surely, 2^126939472865 is an apocalyptic number.

It is an amenable number.

126939472865 is a deficient number, since it is larger than the sum of its proper divisors (28889410591).

126939472865 is a wasteful number, since it uses less digits than its factorization.

126939472865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4649.

The product of its digits is 39191040, while the sum is 62.

The spelling of 126939472865 in words is "one hundred twenty-six billion, nine hundred thirty-nine million, four hundred seventy-two thousand, eight hundred sixty-five".