1699724950225 has 9 divisors (see below), whose sum is σ = 2107667021467. Its totient is φ = 1359774745240.

The previous prime is 1699724950213. The next prime is 1699724950229. The reversal of 1699724950225 is 5220594279961.

The square root of 1699724950225 is 1303735.

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

It can be written as a sum of positive squares in only one way, i.e., 611900982081 + 1087823968144 = 782241^2 + 1042988^2 .

It is not a de Polignac number, because 1699724950225 - 2⁷ = 1699724950097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1699724950229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6388302 + ... + 6649048.

Almost surely, 2^{1699724950225} is an apocalyptic number.

1699724950225 is the 1303735-th square number.

1699724950225 is the 651868-th centered octagonal number.

It is an amenable number.

1699724950225 is a deficient number, since it is larger than the sum of its proper divisors (407942071242).

1699724950225 is an frugal number, since it uses more digits than its factorization.

1699724950225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521504 (or 260752 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 61.

The spelling of 1699724950225 in words is "one trillion, six hundred ninety-nine billion, seven hundred twenty-four million, nine hundred fifty thousand, two hundred twenty-five".