40121971406 has 16 divisors (see below), whose sum is σ = 66072319920. Its totient is φ = 18121097280.

The previous prime is 40121971349. The next prime is 40121971493. The reversal of 40121971406 is 60417912104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5804591 + ... + 5811498.

It is an arithmetic number, because the mean of its divisors is an integer number (4129519995).

Almost surely, 2^40121971406 is an apocalyptic number.

40121971406 is a deficient number, since it is larger than the sum of its proper divisors (25950348514).

40121971406 is a wasteful number, since it uses less digits than its factorization.

40121971406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11616259.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 40121971406 in words is "forty billion, one hundred twenty-one million, nine hundred seventy-one thousand, four hundred six".