40391278754 has 4 divisors (see below), whose sum is σ = 60586918134. Its totient is φ = 20195639376.

The previous prime is 40391278717. The next prime is 40391278757. The reversal of 40391278754 is 45787219304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 31885459225 + 8505819529 = 178565^2 + 92227^2 .

It is not an unprimeable number, because it can be changed into a prime (40391278757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10097819687 + ... + 10097819690.

Almost surely, 2^40391278754 is an apocalyptic number.

40391278754 is a deficient number, since it is larger than the sum of its proper divisors (20195639380).

40391278754 is a wasteful number, since it uses less digits than its factorization.

40391278754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20195639379.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 40391278754 in words is "forty billion, three hundred ninety-one million, two hundred seventy-eight thousand, seven hundred fifty-four".