3640525740 has 36 divisors (see below), whose sum is σ = 11042928624. Its totient is φ = 970806816.

The previous prime is 3640525729. The next prime is 3640525747. The reversal of 3640525740 is 475250463.

3640525740 is a `hidden beast` number, since 3 + 64 + 0 + 525 + 74 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×3640525740³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3640525695 and 3640525704.

It is not an unprimeable number, because it can be changed into a prime (3640525747) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 10112392 + ... + 10112751.

Almost surely, 2^3640525740 is an apocalyptic number.

3640525740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3640525740 is an abundant number, since it is smaller than the sum of its proper divisors (7402402884).

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

3640525740 is a wasteful number, since it uses less digits than its factorization.

3640525740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20225158 (or 20225153 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The square root of 3640525740 is about 60336.7693865026. The cubic root of 3640525740 is about 1538.3483923699.

The spelling of 3640525740 in words is "three billion, six hundred forty million, five hundred twenty-five thousand, seven hundred forty".