40121621564744 has 16 divisors (see below), whose sum is σ = 75235049636220. Its totient is φ = 20058941661760.

The previous prime is 40121621564741. The next prime is 40121621564747. The reversal of 40121621564744 is 44746512612104.

It is an interprime number because it is at equal distance from previous prime (40121621564741) and next prime (40121621564747).

It can be written as a sum of positive squares in 2 ways, for example, as 40121608242244 + 13322500 = 6334162^2 + 3650^2 .

It is not an unprimeable number, because it can be changed into a prime (40121621564741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233548847 + ... + 233720574.

Almost surely, 2^{40121621564744} is an apocalyptic number.

It is an amenable number.

40121621564744 is a deficient number, since it is larger than the sum of its proper divisors (35113428071476).

40121621564744 is a wasteful number, since it uses less digits than its factorization.

40121621564744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467280160 (or 467280156 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 40121621564744 in words is "forty trillion, one hundred twenty-one billion, six hundred twenty-one million, five hundred sixty-four thousand, seven hundred forty-four".