245031417510661 has 8 divisors (see below), whose sum is σ = 246657693345624. Its totient is φ = 243405971627520.

The previous prime is 245031417510617. The next prime is 245031417510697. The reversal of 245031417510661 is 166015714130542.

It can be written as a sum of positive squares in 4 ways, for example, as 2858094548100 + 242173322962561 = 1690590^2 + 15561919^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245031417510661 - 2¹¹ = 245031417508613 is a prime.

It is a super-2 number, since 2×245031417510661² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245031417510361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206895520 + ... + 208076473.

It is an arithmetic number, because the mean of its divisors is an integer number (30832211668203).

Almost surely, 2^{245031417510661} is an apocalyptic number.

It is an amenable number.

245031417510661 is a deficient number, since it is larger than the sum of its proper divisors (1626275834963).

245031417510661 is a wasteful number, since it uses less digits than its factorization.

245031417510661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414975911.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 245031417510661 in words is "two hundred forty-five trillion, thirty-one billion, four hundred seventeen million, five hundred ten thousand, six hundred sixty-one".