161481147540 has 24 divisors (see below), whose sum is σ = 452147213280. Its totient is φ = 43061639328.

The previous prime is 161481147533. The next prime is 161481147637. The reversal of 161481147540 is 45741184161.

It is a happy number.

It is a super-2 number, since 2×161481147540² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161481147492 and 161481147501.

It is a congruent number.

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, 1345676170 + ... + 1345676289.

It is an arithmetic number, because the mean of its divisors is an integer number (18839467220).

Almost surely, 2^161481147540 is an apocalyptic number.

161481147540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161481147540 is an abundant number, since it is smaller than the sum of its proper divisors (290666065740).

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

161481147540 is a wasteful number, since it uses less digits than its factorization.

161481147540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691352471 (or 2691352469 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 161481147540 in words is "one hundred sixty-one billion, four hundred eighty-one million, one hundred forty-seven thousand, five hundred forty".