161220457402652 has 6 divisors (see below), whose sum is σ = 282135800454648. Its totient is φ = 80610228701324.

The previous prime is 161220457402577. The next prime is 161220457402673. The reversal of 161220457402652 is 256204754022161.

It is a junction number, because it is equal to n+sod(n) for n = 161220457402597 and 161220457402606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20152557175328 + ... + 20152557175335.

It is an arithmetic number, because the mean of its divisors is an integer number (47022633409108).

Almost surely, 2^{161220457402652} is an apocalyptic number.

It is an amenable number.

161220457402652 is a deficient number, since it is larger than the sum of its proper divisors (120915343051996).

161220457402652 is a wasteful number, since it uses less digits than its factorization.

161220457402652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40305114350667 (or 40305114350665 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 47.

The spelling of 161220457402652 in words is "one hundred sixty-one trillion, two hundred twenty billion, four hundred fifty-seven million, four hundred two thousand, six hundred fifty-two".