161005262040 has 192 divisors, whose sum is σ = 629494444800. Its totient is φ = 34864286976.

The previous prime is 161005261987. The next prime is 161005262057. The reversal of 161005262040 is 40262500161.

161005262040 is a `hidden beast` number, since 1 + 610 + 0 + 5 + 2 + 6 + 2 + 0 + 40 = 666.

161005262040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161005261995 and 161005262013.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1633462 + ... + 1729221.

It is an arithmetic number, because the mean of its divisors is an integer number (3278616900).

Almost surely, 2^161005262040 is an apocalyptic number.

161005262040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161005262040 is an abundant number, since it is smaller than the sum of its proper divisors (468489182760).

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

161005262040 is a wasteful number, since it uses less digits than its factorization.

161005262040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362726 (or 3362719 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The spelling of 161005262040 in words is "one hundred sixty-one billion, five million, two hundred sixty-two thousand, forty".