43540121038 has 16 divisors (see below), whose sum is σ = 66734902080. Its totient is φ = 21295641856.

The previous prime is 43540121029. The next prime is 43540121039. The reversal of 43540121038 is 83012104534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43540121039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58758 + ... + 300886.

It is an arithmetic number, because the mean of its divisors is an integer number (4170931380).

Almost surely, 2^43540121038 is an apocalyptic number.

43540121038 is a deficient number, since it is larger than the sum of its proper divisors (23194781042).

43540121038 is a wasteful number, since it uses less digits than its factorization.

43540121038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244091.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 43540121038 in words is "forty-three billion, five hundred forty million, one hundred twenty-one thousand, thirty-eight".