40172997826 has 32 divisors (see below), whose sum is σ = 67451888448. Its totient is φ = 17822877120.

The previous prime is 40172997803. The next prime is 40172997827. The reversal of 40172997826 is 62879927104.

It is a super-2 number, since 2×40172997826² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40172997827) 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 15 ways as a sum of consecutive naturals, for example, 171720 + ... + 331411.

It is an arithmetic number, because the mean of its divisors is an integer number (2107871514).

Almost surely, 2^40172997826 is an apocalyptic number.

40172997826 is a deficient number, since it is larger than the sum of its proper divisors (27278890622).

40172997826 is a wasteful number, since it uses less digits than its factorization.

40172997826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503266.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 40172997826 in words is "forty billion, one hundred seventy-two million, nine hundred ninety-seven thousand, eight hundred twenty-six".