126156254565 has 32 divisors (see below), whose sum is σ = 221472890496. Its totient is φ = 60813090560.

The previous prime is 126156254509. The next prime is 126156254573. The reversal of 126156254565 is 565452651621.

It is not a de Polignac number, because 126156254565 - 2¹² = 126156250469 is a prime.

It is a congruent number.

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, 2181234 + ... + 2238323.

It is an arithmetic number, because the mean of its divisors is an integer number (6921027828).

Almost surely, 2^126156254565 is an apocalyptic number.

126156254565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126156254565 is a deficient number, since it is larger than the sum of its proper divisors (95316635931).

126156254565 is a wasteful number, since it uses less digits than its factorization.

126156254565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4419749.

The product of its digits is 2160000, while the sum is 48.

The spelling of 126156254565 in words is "one hundred twenty-six billion, one hundred fifty-six million, two hundred fifty-four thousand, five hundred sixty-five".