1645954782 has 32 divisors (see below), whose sum is σ = 3358895904. Its totient is φ = 537600000.

The previous prime is 1645954753. The next prime is 1645954789. The reversal of 1645954782 is 2874595461.

It is a super-3 number, since 3×1645954782³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645954789) 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, 44782 + ... + 72782.

It is an arithmetic number, because the mean of its divisors is an integer number (104965497).

Almost surely, 2^1645954782 is an apocalyptic number.

1645954782 is an abundant number, since it is smaller than the sum of its proper divisors (1712941122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1645954782 is a wasteful number, since it uses less digits than its factorization.

1645954782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28204.

The product of its digits is 2419200, while the sum is 51.

The square root of 1645954782 is about 40570.3682753805. The cubic root of 1645954782 is about 1180.6992843539.

The spelling of 1645954782 in words is "one billion, six hundred forty-five million, nine hundred fifty-four thousand, seven hundred eighty-two".