1601553172 has 6 divisors (see below), whose sum is σ = 2802718058. Its totient is φ = 800776584.

The previous prime is 1601553157. The next prime is 1601553197. The reversal of 1601553172 is 2713551061.

It can be written as a sum of positive squares in only one way, i.e., 1331082256 + 270470916 = 36484^2 + 16446^2 .

It is a super-3 number, since 3×1601553172³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200194143 + ... + 200194150.

Almost surely, 2^1601553172 is an apocalyptic number.

It is an amenable number.

1601553172 is a deficient number, since it is larger than the sum of its proper divisors (1201164886).

1601553172 is a wasteful number, since it uses less digits than its factorization.

1601553172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400388297 (or 400388295 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 1601553172 is about 40019.4099406775. The cubic root of 1601553172 is about 1169.9854314304.

The spelling of 1601553172 in words is "one billion, six hundred one million, five hundred fifty-three thousand, one hundred seventy-two".