521695447090 has 32 divisors (see below), whose sum is σ = 1020361904640. Its totient is φ = 191317852800.

The previous prime is 521695447073. The next prime is 521695447103. The reversal of 521695447090 is 90744596125.

It is a super-2 number, since 2×521695447090² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44280651 + ... + 44292430.

It is an arithmetic number, because the mean of its divisors is an integer number (31886309520).

Almost surely, 2^521695447090 is an apocalyptic number.

521695447090 is a deficient number, since it is larger than the sum of its proper divisors (498666457550).

521695447090 is a wasteful number, since it uses less digits than its factorization.

521695447090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88573138.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 521695447090 in words is "five hundred twenty-one billion, six hundred ninety-five million, four hundred forty-seven thousand, ninety".