161348694240 has 192 divisors, whose sum is σ = 522587370816. Its totient is φ = 41815130112.

The previous prime is 161348694181. The next prime is 161348694251. The reversal of 161348694240 is 42496843161.

It is a happy number.

It is a super-2 number, since 2×161348694240² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 161348694240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16920514 + ... + 16930046.

It is an arithmetic number, because the mean of its divisors is an integer number (2721809223).

Almost surely, 2^161348694240 is an apocalyptic number.

161348694240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161348694240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261293685408).

161348694240 is an abundant number, since it is smaller than the sum of its proper divisors (361238676576).

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

161348694240 is a wasteful number, since it uses less digits than its factorization.

161348694240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10541 (or 10533 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The spelling of 161348694240 in words is "one hundred sixty-one billion, three hundred forty-eight million, six hundred ninety-four thousand, two hundred forty".