161473494381940 has 48 divisors (see below), whose sum is σ = 365221836806400. Its totient is φ = 59613910093440.

The previous prime is 161473494381937. The next prime is 161473494381943. The reversal of 161473494381940 is 49183494374161.

It is an interprime number because it is at equal distance from previous prime (161473494381937) and next prime (161473494381943).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161473494381943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34639390 + ... + 39023509.

It is an arithmetic number, because the mean of its divisors is an integer number (7608788266800).

Almost surely, 2^{161473494381940} is an apocalyptic number.

161473494381940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161473494381940 is an abundant number, since it is smaller than the sum of its proper divisors (203748342424460).

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

161473494381940 is a wasteful number, since it uses less digits than its factorization.

161473494381940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73671352 (or 73671350 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 64.

The spelling of 161473494381940 in words is "one hundred sixty-one trillion, four hundred seventy-three billion, four hundred ninety-four million, three hundred eighty-one thousand, nine hundred forty".