40920421540 has 24 divisors (see below), whose sum is σ = 90987761592. Its totient is φ = 15405335040.

The previous prime is 40920421483. The next prime is 40920421547. The reversal of 40920421540 is 4512402904.

It can be written as a sum of positive squares in 4 ways, for example, as 1908641344 + 39011780196 = 43688^2 + 197514^2 .

It is a super-2 number, since 2×40920421540² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40920421547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60176751 + ... + 60177430.

It is an arithmetic number, because the mean of its divisors is an integer number (3791156733).

Almost surely, 2^40920421540 is an apocalyptic number.

It is an amenable number.

40920421540 is an abundant number, since it is smaller than the sum of its proper divisors (50067340052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40920421540 is a wasteful number, since it uses less digits than its factorization.

40920421540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120354207 (or 120354205 counting only the distinct ones).

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

The spelling of 40920421540 in words is "forty billion, nine hundred twenty million, four hundred twenty-one thousand, five hundred forty".