5257145645 has 4 divisors (see below), whose sum is σ = 6308574780. Its totient is φ = 4205716512.

The previous prime is 5257145611. The next prime is 5257145659. The reversal of 5257145645 is 5465417525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3607323721 + 1649821924 = 60061^2 + 40618^2 .

It is a cyclic number.

It is not a de Polignac number, because 5257145645 - 2¹⁴ = 5257129261 is a prime.

It is a super-3 number, since 3×5257145645³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5257145596 and 5257145605.

It is a congruent number.

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, 525714560 + ... + 525714569.

It is an arithmetic number, because the mean of its divisors is an integer number (1577143695).

Almost surely, 2^5257145645 is an apocalyptic number.

It is an amenable number.

5257145645 is a deficient number, since it is larger than the sum of its proper divisors (1051429135).

5257145645 is a wasteful number, since it uses less digits than its factorization.

5257145645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051429134.

The product of its digits is 840000, while the sum is 44.

The square root of 5257145645 is about 72506.1765989629. The cubic root of 5257145645 is about 1738.8014872663.

The spelling of 5257145645 in words is "five billion, two hundred fifty-seven million, one hundred forty-five thousand, six hundred forty-five".