521161310103464 has 8 divisors (see below), whose sum is σ = 977177456444010. Its totient is φ = 260580655051728.

The previous prime is 521161310103461. The next prime is 521161310103479. The reversal of 521161310103464 is 464301013161125.

It can be written as a sum of positive squares in only one way, i.e., 512152656024100 + 9008654079364 = 22630790^2 + 3001442^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×521161310103464² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (521161310103461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32572581881459 + ... + 32572581881474.

Almost surely, 2^{521161310103464} is an apocalyptic number.

It is an amenable number.

521161310103464 is a deficient number, since it is larger than the sum of its proper divisors (456016146340546).

521161310103464 is a wasteful number, since it uses less digits than its factorization.

521161310103464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65145163762939 (or 65145163762935 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

Adding to 521161310103464 its reverse (464301013161125), we get a palindrome (985462323264589).

The spelling of 521161310103464 in words is "five hundred twenty-one trillion, one hundred sixty-one billion, three hundred ten million, one hundred three thousand, four hundred sixty-four".