3651553725 has 24 divisors (see below), whose sum is σ = 6077236032. Its totient is φ = 1934592000.

The previous prime is 3651553723. The next prime is 3651553729. The reversal of 3651553725 is 5273551563.

It is a happy number.

It is not a de Polignac number, because 3651553725 - 2¹ = 3651553723 is a prime.

It is a super-2 number, since 2×3651553725² = 26667689213122751250, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3651553723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149892 + ... + 172541.

It is an arithmetic number, because the mean of its divisors is an integer number (253218168).

Almost surely, 2^3651553725 is an apocalyptic number.

It is an amenable number.

3651553725 is a deficient number, since it is larger than the sum of its proper divisors (2425682307).

3651553725 is a wasteful number, since it uses less digits than its factorization.

3651553725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322597 (or 322592 counting only the distinct ones).

The product of its digits is 472500, while the sum is 42.

The square root of 3651553725 is about 60428.0872194379. The cubic root of 3651553725 is about 1539.9001628930.

The spelling of 3651553725 in words is "three billion, six hundred fifty-one million, five hundred fifty-three thousand, seven hundred twenty-five".