161754451582540 has 24 divisors (see below), whose sum is σ = 339693746105952. Its totient is φ = 64699990579200.

The previous prime is 161754451582519. The next prime is 161754451582573. The reversal of 161754451582540 is 45285154457161.

It is a super-2 number, since 2×161754451582540² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

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, 111137269 + ... + 112583308.

It is an arithmetic number, because the mean of its divisors is an integer number (14153906087748).

Almost surely, 2^{161754451582540} is an apocalyptic number.

161754451582540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161754451582540 is an abundant number, since it is smaller than the sum of its proper divisors (177939294523412).

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

161754451582540 is a wasteful number, since it uses less digits than its factorization.

161754451582540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223756737 (or 223756735 counting only the distinct ones).

The product of its (nonzero) digits is 26880000, while the sum is 58.

The spelling of 161754451582540 in words is "one hundred sixty-one trillion, seven hundred fifty-four billion, four hundred fifty-one million, five hundred eighty-two thousand, five hundred forty".