64410404525 has 12 divisors (see below), whose sum is σ = 84567072852. Its totient is φ = 48497245440.

The previous prime is 64410404519. The next prime is 64410404537. The reversal of 64410404525 is 52540401446.

It can be written as a sum of positive squares in 6 ways, for example, as 6590354761 + 57820049764 = 81181^2 + 240458^2 .

It is not a de Polignac number, because 64410404525 - 2²² = 64406210221 is a prime.

It is a super-2 number, since 2×64410404525² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75776522 + ... + 75777371.

It is an arithmetic number, because the mean of its divisors is an integer number (7047256071).

Almost surely, 2^64410404525 is an apocalyptic number.

It is an amenable number.

64410404525 is a deficient number, since it is larger than the sum of its proper divisors (20156668327).

64410404525 is a wasteful number, since it uses less digits than its factorization.

64410404525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151553920 (or 151553915 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 64410404525 in words is "sixty-four billion, four hundred ten million, four hundred four thousand, five hundred twenty-five".