161512473037540 has 24 divisors (see below), whose sum is σ = 357027571978560. Its totient is φ = 61204726624608.

The previous prime is 161512473037441. The next prime is 161512473037549. The reversal of 161512473037540 is 45730374215161.

It is not an unprimeable number, because it can be changed into a prime (161512473037549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212516411512 + ... + 212516412271.

It is an arithmetic number, because the mean of its divisors is an integer number (14876148832440).

Almost surely, 2^{161512473037540} is an apocalyptic number.

161512473037540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161512473037540 is an abundant number, since it is smaller than the sum of its proper divisors (195515098941020).

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

161512473037540 is a wasteful number, since it uses less digits than its factorization.

161512473037540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425032823811 (or 425032823809 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 161512473037540 in words is "one hundred sixty-one trillion, five hundred twelve billion, four hundred seventy-three million, thirty-seven thousand, five hundred forty".