738154561 has 9 divisors (see below), whose sum is σ = 748317193. Its totient is φ = 728129200.

The previous prime is 738154537. The next prime is 738154567. The reversal of 738154561 is 165451837.

It is a happy number.

The square root of 738154561 is 27169.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2660161 + 735494400 = 1631^2 + 27120^2 .

It is not a de Polignac number, because 738154561 - 2⁹ = 738154049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (738154567) by changing a digit.

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 in 8 ways as a sum of consecutive naturals, for example, 2743935 + ... + 2744203.

Almost surely, 2^738154561 is an apocalyptic number.

738154561 is the 27169-th square number.

738154561 is the 13585-th centered octagonal number.

It is an amenable number.

738154561 is a deficient number, since it is larger than the sum of its proper divisors (10162632).

738154561 is an frugal number, since it uses more digits than its factorization.

738154561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 370 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The cubic root of 738154561 is about 903.7516485823.

The spelling of 738154561 in words is "seven hundred thirty-eight million, one hundred fifty-four thousand, five hundred sixty-one".