40129721546 has 16 divisors (see below), whose sum is σ = 62819544384. Its totient is φ = 19190090304.

The previous prime is 40129721531. The next prime is 40129721563. The reversal of 40129721546 is 64512792104.

It is a super-2 number, since 2×40129721546² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352805 + ... + 452471.

It is an arithmetic number, because the mean of its divisors is an integer number (3926221524).

Almost surely, 2^40129721546 is an apocalyptic number.

40129721546 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

40129721546 is a deficient number, since it is larger than the sum of its proper divisors (22689822838).

40129721546 is a wasteful number, since it uses less digits than its factorization.

40129721546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108445.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 40129721546 in words is "forty billion, one hundred twenty-nine million, seven hundred twenty-one thousand, five hundred forty-six".