40902531478 has 4 divisors (see below), whose sum is σ = 61353797220. Its totient is φ = 20451265738.

The previous prime is 40902531473. The next prime is 40902531491. The reversal of 40902531478 is 87413520904.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40902531473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10225632868 + ... + 10225632871.

It is an arithmetic number, because the mean of its divisors is an integer number (15338449305).

Almost surely, 2^40902531478 is an apocalyptic number.

40902531478 is a deficient number, since it is larger than the sum of its proper divisors (20451265742).

40902531478 is a wasteful number, since it uses less digits than its factorization.

40902531478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20451265741.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 40902531478 in words is "forty billion, nine hundred two million, five hundred thirty-one thousand, four hundred seventy-eight".