1521452543545 has 32 divisors (see below), whose sum is σ = 2057098218624. Its totient is φ = 1070761536000.

The previous prime is 1521452543539. The next prime is 1521452543549. The reversal of 1521452543545 is 5453452541251.

It is a happy number.

It is not a de Polignac number, because 1521452543545 - 2³ = 1521452543537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1521452543495 and 1521452543504.

It is not an unprimeable number, because it can be changed into a prime (1521452543549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3362131 + ... + 3787720.

It is an arithmetic number, because the mean of its divisors is an integer number (64284319332).

Almost surely, 2^{1521452543545} is an apocalyptic number.

It is an amenable number.

1521452543545 is a deficient number, since it is larger than the sum of its proper divisors (535645675079).

1521452543545 is a wasteful number, since it uses less digits than its factorization.

1521452543545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7149993.

The product of its digits is 2400000, while the sum is 46.

The spelling of 1521452543545 in words is "one trillion, five hundred twenty-one billion, four hundred fifty-two million, five hundred forty-three thousand, five hundred forty-five".