161525001464 has 8 divisors (see below), whose sum is σ = 302859377760. Its totient is φ = 80762500728.

The previous prime is 161525001457. The next prime is 161525001467. The reversal of 161525001464 is 464100525161.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161525001467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10095312584 + ... + 10095312599.

It is an arithmetic number, because the mean of its divisors is an integer number (37857422220).

Almost surely, 2^161525001464 is an apocalyptic number.

It is an amenable number.

161525001464 is a deficient number, since it is larger than the sum of its proper divisors (141334376296).

161525001464 is a wasteful number, since it uses less digits than its factorization.

161525001464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20190625189 (or 20190625185 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 161525001464 in words is "one hundred sixty-one billion, five hundred twenty-five million, one thousand, four hundred sixty-four".