40161134160728 has 64 divisors (see below), whose sum is σ = 87867648936000. Its totient is φ = 17201770091520.

The previous prime is 40161134160703. The next prime is 40161134160733. The reversal of 40161134160728 is 82706143116104.

It is a super-2 number, since 2×40161134160728² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344258 + ... + 8968878.

It is an arithmetic number, because the mean of its divisors is an integer number (1372932014625).

Almost surely, 2^{40161134160728} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40161134160728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43933824468000).

40161134160728 is an abundant number, since it is smaller than the sum of its proper divisors (47706514775272).

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

40161134160728 is a wasteful number, since it uses less digits than its factorization.

40161134160728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626345 (or 8626327 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 40161134160728 in words is "forty trillion, one hundred sixty-one billion, one hundred thirty-four million, one hundred sixty thousand, seven hundred twenty-eight".