1645258632 has 32 divisors (see below), whose sum is σ = 4291980480. Its totient is φ = 524575040.

The previous prime is 1645258591. The next prime is 1645258651. The reversal of 1645258632 is 2368525461.

It is a super-2 number, since 2×1645258632² = 5413751932341022848, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1489719 + ... + 1490822.

It is an arithmetic number, because the mean of its divisors is an integer number (134124390).

Almost surely, 2^1645258632 is an apocalyptic number.

1645258632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1645258632 is an abundant number, since it is smaller than the sum of its proper divisors (2646721848).

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

1645258632 is a wasteful number, since it uses less digits than its factorization.

1645258632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980573 (or 2980569 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The square root of 1645258632 is about 40561.7878304199. The cubic root of 1645258632 is about 1180.5328035323.

The spelling of 1645258632 in words is "one billion, six hundred forty-five million, two hundred fifty-eight thousand, six hundred thirty-two".