161653004 has 12 divisors (see below), whose sum is σ = 283358544. Its totient is φ = 80693424.

The previous prime is 161652937. The next prime is 161653027. The reversal of 161653004 is 400356161.

161653004 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161653004² = 52263387404448032, which contains 22 as substring.

161653004 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30512 + ... + 35415.

It is an arithmetic number, because the mean of its divisors is an integer number (23613212).

Almost surely, 2^161653004 is an apocalyptic number.

It is an amenable number.

161653004 is a deficient number, since it is larger than the sum of its proper divisors (121705540).

161653004 is a wasteful number, since it uses less digits than its factorization.

161653004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66544 (or 66542 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 161653004 is about 12714.2834638842. The cubic root of 161653004 is about 544.7466813655.

The spelling of 161653004 in words is "one hundred sixty-one million, six hundred fifty-three thousand, four".