525990576721 has 8 divisors (see below), whose sum is σ = 540215680104. Its totient is φ = 511765954560.

The previous prime is 525990576719. The next prime is 525990576743. The reversal of 525990576721 is 127675099525.

It can be written as a sum of positive squares in 4 ways, for example, as 95549610321 + 430440966400 = 309111^2 + 656080^2 .

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 525990576721 - 2¹ = 525990576719 is a prime.

It is a super-2 number, since 2×525990576721² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525990576121) 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, 3794001 + ... + 3930193.

It is an arithmetic number, because the mean of its divisors is an integer number (67526960013).

Almost surely, 2^525990576721 is an apocalyptic number.

It is an amenable number.

525990576721 is a deficient number, since it is larger than the sum of its proper divisors (14225103383).

525990576721 is a wasteful number, since it uses less digits than its factorization.

525990576721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240611.

The product of its (nonzero) digits is 11907000, while the sum is 58.

The spelling of 525990576721 in words is "five hundred twenty-five billion, nine hundred ninety million, five hundred seventy-six thousand, seven hundred twenty-one".