40123435656 has 32 divisors (see below), whose sum is σ = 103544352000. Its totient is φ = 12943043520.

The previous prime is 40123435633. The next prime is 40123435679. The reversal of 40123435656 is 65653432104.

It is an interprime number because it is at equal distance from previous prime (40123435633) and next prime (40123435679).

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, 26963931 + ... + 26965418.

It is an arithmetic number, because the mean of its divisors is an integer number (3235761000).

Almost surely, 2^40123435656 is an apocalyptic number.

It is an amenable number.

40123435656 is an abundant number, since it is smaller than the sum of its proper divisors (63420916344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40123435656 is a wasteful number, since it uses less digits than its factorization.

40123435656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53929389 (or 53929385 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 40123435656 in words is "forty billion, one hundred twenty-three million, four hundred thirty-five thousand, six hundred fifty-six".