501243531545 has 32 divisors (see below), whose sum is σ = 622176774912. Its totient is φ = 387422042112.

The previous prime is 501243531521. The next prime is 501243531559. The reversal of 501243531545 is 545135342105.

It is a cyclic number.

It is not a de Polignac number, because 501243531545 - 2⁸ = 501243531289 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 501243531499 and 501243531508.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12199877 + ... + 12240893.

It is an arithmetic number, because the mean of its divisors is an integer number (19443024216).

Almost surely, 2^501243531545 is an apocalyptic number.

It is an amenable number.

501243531545 is a deficient number, since it is larger than the sum of its proper divisors (120933243367).

501243531545 is a wasteful number, since it uses less digits than its factorization.

501243531545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41681.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 501243531545 in words is "five hundred one billion, two hundred forty-three million, five hundred thirty-one thousand, five hundred forty-five".