40128075378 has 40 divisors (see below), whose sum is σ = 89969847660. Its totient is φ = 13368106080.

The previous prime is 40128075371. The next prime is 40128075401. The reversal of 40128075378 is 87357082104.

It can be written as a sum of positive squares in 2 ways, for example, as 34183202769 + 5944872609 = 184887^2 + 77103^2 .

It is a super-2 number, since 2×40128075378² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40128075371) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 204388 + ... + 349328.

Almost surely, 2^40128075378 is an apocalyptic number.

40128075378 is an abundant number, since it is smaller than the sum of its proper divisors (49841772282).

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

40128075378 is a wasteful number, since it uses less digits than its factorization.

40128075378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146664 (or 146655 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 40128075378 in words is "forty billion, one hundred twenty-eight million, seventy-five thousand, three hundred seventy-eight".