501961545 has 24 divisors (see below), whose sum is σ = 907897536. Its totient is φ = 256072608.

The previous prime is 501961511. The next prime is 501961571. The reversal of 501961545 is 545169105.

501961545 is a `hidden beast` number, since 50 + 1 + 9 + 61 + 545 = 666.

It is not a de Polignac number, because 501961545 - 2¹⁷ = 501830473 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241459 + ... + 243528.

It is an arithmetic number, because the mean of its divisors is an integer number (37829064).

Almost surely, 2^501961545 is an apocalyptic number.

It is an amenable number.

501961545 is a deficient number, since it is larger than the sum of its proper divisors (405935991).

501961545 is a wasteful number, since it uses less digits than its factorization.

501961545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485021 (or 485018 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 501961545 is about 22404.4983206498. The cubic root of 501961545 is about 794.7370911828.

It can be divided in two parts, 5019 and 61545, that added together give a square (66564 = 258²).

The spelling of 501961545 in words is "five hundred one million, nine hundred sixty-one thousand, five hundred forty-five".