40740733521 has 6 divisors (see below), whose sum is σ = 58847726210. Its totient is φ = 27160489008.

The previous prime is 40740733493. The next prime is 40740733531. The reversal of 40740733521 is 12533704704.

It can be written as a sum of positive squares in only one way, i.e., 40739385600 + 1347921 = 201840^2 + 1161^2 .

It is not a de Polignac number, because 40740733521 - 2¹³ = 40740725329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40740733531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2263374076 + ... + 2263374093.

Almost surely, 2^40740733521 is an apocalyptic number.

It is an amenable number.

40740733521 is a deficient number, since it is larger than the sum of its proper divisors (18106992689).

40740733521 is a wasteful number, since it uses less digits than its factorization.

40740733521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4526748175 (or 4526748172 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The spelling of 40740733521 in words is "forty billion, seven hundred forty million, seven hundred thirty-three thousand, five hundred twenty-one".