646061545 has 16 divisors (see below), whose sum is σ = 802948608. Its totient is φ = 498510720.

The previous prime is 646061543. The next prime is 646061587. The reversal of 646061545 is 545160646.

It is not a de Polignac number, because 646061545 - 2¹ = 646061543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646061543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40797 + ... + 54373.

It is an arithmetic number, because the mean of its divisors is an integer number (50184288).

Almost surely, 2^646061545 is an apocalyptic number.

It is an amenable number.

646061545 is a deficient number, since it is larger than the sum of its proper divisors (156887063).

646061545 is a wasteful number, since it uses less digits than its factorization.

646061545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13920.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 646061545 is about 25417.7407532613. The cubic root of 646061545 is about 864.4859988837.

The spelling of 646061545 in words is "six hundred forty-six million, sixty-one thousand, five hundred forty-five".