1521475477064 has 8 divisors (see below), whose sum is σ = 2852766519510. Its totient is φ = 760737738528.

The previous prime is 1521475477063. The next prime is 1521475477073. The reversal of 1521475477064 is 4607745741251.

It can be written as a sum of positive squares in only one way, i.e., 1338070562500 + 183404914564 = 1156750^2 + 428258^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1521475476997 and 1521475477015.

It is not an unprimeable number, because it can be changed into a prime (1521475477063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95092217309 + ... + 95092217324.

Almost surely, 2^{1521475477064} is an apocalyptic number.

It is an amenable number.

1521475477064 is a deficient number, since it is larger than the sum of its proper divisors (1331291042446).

1521475477064 is a wasteful number, since it uses less digits than its factorization.

1521475477064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190184434639 (or 190184434635 counting only the distinct ones).

The product of its (nonzero) digits is 6585600, while the sum is 53.

The spelling of 1521475477064 in words is "one trillion, five hundred twenty-one billion, four hundred seventy-five million, four hundred seventy-seven thousand, sixty-four".