1645762536 has 160 divisors (see below), whose sum is σ = 5050346400. Its totient is φ = 496575360.

The previous prime is 1645762507. The next prime is 1645762583. The reversal of 1645762536 is 6352675461.

1645762536 is a `hidden beast` number, since 1 + 6 + 4 + 57 + 62 + 536 = 666.

Its product of digits (907200) is a multiple of the sum of its prime divisors (1008).

It is a junction number, because it is equal to n+sod(n) for n = 1645762491 and 1645762500.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2658435 + ... + 2659053.

It is an arithmetic number, because the mean of its divisors is an integer number (31564665).

Almost surely, 2^1645762536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1645762536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2525173200).

1645762536 is an abundant number, since it is smaller than the sum of its proper divisors (3404583864).

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

1645762536 is a wasteful number, since it uses less digits than its factorization.

1645762536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021 (or 1008 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The square root of 1645762536 is about 40567.9989154013. The cubic root of 1645762536 is about 1180.6533143684.

The spelling of 1645762536 in words is "one billion, six hundred forty-five million, seven hundred sixty-two thousand, five hundred thirty-six".