40155521403 has 4 divisors (see below), whose sum is σ = 53540695208. Its totient is φ = 26770347600.

The previous prime is 40155521389. The next prime is 40155521423. The reversal of 40155521403 is 30412555104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40155521403 - 2⁴ = 40155521387 is a prime.

It is a super-2 number, since 2×40155521403² (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 (40155521423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6692586898 + ... + 6692586903.

It is an arithmetic number, because the mean of its divisors is an integer number (13385173802).

Almost surely, 2^40155521403 is an apocalyptic number.

40155521403 is a deficient number, since it is larger than the sum of its proper divisors (13385173805).

40155521403 is a wasteful number, since it uses less digits than its factorization.

40155521403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13385173804.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 40155521403 in words is "forty billion, one hundred fifty-five million, five hundred twenty-one thousand, four hundred three".