40178451738 has 16 divisors (see below), whose sum is σ = 83850682176. Its totient is φ = 12810520800.

The previous prime is 40178451727. The next prime is 40178451739. The reversal of 40178451738 is 83715487104.

It is a super-2 number, since 2×40178451738² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40178451739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145573963 + ... + 145574238.

It is an arithmetic number, because the mean of its divisors is an integer number (5240667636).

Almost surely, 2^40178451738 is an apocalyptic number.

40178451738 is an abundant number, since it is smaller than the sum of its proper divisors (43672230438).

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

40178451738 is a wasteful number, since it uses less digits than its factorization.

40178451738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291148229.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 40178451738 in words is "forty billion, one hundred seventy-eight million, four hundred fifty-one thousand, seven hundred thirty-eight".