40122890642 has 4 divisors (see below), whose sum is σ = 60184335966. Its totient is φ = 20061445320.

The previous prime is 40122890627. The next prime is 40122890657. The reversal of 40122890642 is 24609822104.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (40122890627) and next prime (40122890657).

It can be written as a sum of positive squares in only one way, i.e., 40116484681 + 6405961 = 200291^2 + 2531^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40122890596 and 40122890605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10030722659 + ... + 10030722662.

Almost surely, 2^40122890642 is an apocalyptic number.

40122890642 is a deficient number, since it is larger than the sum of its proper divisors (20061445324).

40122890642 is a wasteful number, since it uses less digits than its factorization.

40122890642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20061445323.

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 40122890642 in words is "forty billion, one hundred twenty-two million, eight hundred ninety thousand, six hundred forty-two".