40178745478 has 16 divisors (see below), whose sum is σ = 62534716560. Its totient is φ = 19338026400.

The previous prime is 40178745413. The next prime is 40178745547. The reversal of 40178745478 is 87454787104.

It is a super-2 number, since 2×40178745478² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 1027233 + ... + 1065628.

It is an arithmetic number, because the mean of its divisors is an integer number (3908419785).

Almost surely, 2^40178745478 is an apocalyptic number.

40178745478 is a deficient number, since it is larger than the sum of its proper divisors (22355971082).

40178745478 is a wasteful number, since it uses less digits than its factorization.

40178745478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093223.

The product of its (nonzero) digits is 7024640, while the sum is 55.

The spelling of 40178745478 in words is "forty billion, one hundred seventy-eight million, seven hundred forty-five thousand, four hundred seventy-eight".