40194729456 has 80 divisors (see below), whose sum is σ = 122498254848. Its totient is φ = 11113747200.

The previous prime is 40194729427. The next prime is 40194729481. The reversal of 40194729456 is 65492749104.

It is a junction number, because it is equal to n+sod(n) for n = 40194729399 and 40194729408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1919055 + ... + 1939886.

Almost surely, 2^40194729456 is an apocalyptic number.

It is an amenable number.

40194729456 is an abundant number, since it is smaller than the sum of its proper divisors (82303525392).

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

40194729456 is a wasteful number, since it uses less digits than its factorization.

40194729456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3858990 (or 3858984 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 40194729456 in words is "forty billion, one hundred ninety-four million, seven hundred twenty-nine thousand, four hundred fifty-six".