40015421545 has 16 divisors (see below), whose sum is σ = 52387782912. Its totient is φ = 29099925760.

The previous prime is 40015421527. The next prime is 40015421549. The reversal of 40015421545 is 54512451004.

It is a happy number.

It is not a de Polignac number, because 40015421545 - 2¹¹ = 40015419497 is a prime.

It is a super-2 number, since 2×40015421545² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40015421549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1204224 + ... + 1237006.

It is an arithmetic number, because the mean of its divisors is an integer number (3274236432).

Almost surely, 2^40015421545 is an apocalyptic number.

It is an amenable number.

40015421545 is a deficient number, since it is larger than the sum of its proper divisors (12372361367).

40015421545 is a wasteful number, since it uses less digits than its factorization.

40015421545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54992.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 40015421545 its reverse (54512451004), we get a palindrome (94527872549).

The spelling of 40015421545 in words is "forty billion, fifteen million, four hundred twenty-one thousand, five hundred forty-five".