40345542121 has 8 divisors (see below), whose sum is σ = 40393902080. Its totient is φ = 40297210992.

The previous prime is 40345542091. The next prime is 40345542137. The reversal of 40345542121 is 12124554304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40345542121 - 2¹⁷ = 40345411049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40345542151) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 4040491 + ... + 4050463.

It is an arithmetic number, because the mean of its divisors is an integer number (5049237760).

Almost surely, 2^40345542121 is an apocalyptic number.

It is an amenable number.

40345542121 is a deficient number, since it is larger than the sum of its proper divisors (48359959).

40345542121 is a wasteful number, since it uses less digits than its factorization.

40345542121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14415.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 40345542121 in words is "forty billion, three hundred forty-five million, five hundred forty-two thousand, one hundred twenty-one".