3657721948 has 6 divisors (see below), whose sum is σ = 6401013416. Its totient is φ = 1828860972.

The previous prime is 3657721897. The next prime is 3657721967. The reversal of 3657721948 is 8491277563.

It is a junction number, because it is equal to n+sod(n) for n = 3657721895 and 3657721904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457215240 + ... + 457215247.

Almost surely, 2^3657721948 is an apocalyptic number.

It is an amenable number.

3657721948 is a deficient number, since it is larger than the sum of its proper divisors (2743291468).

3657721948 is a wasteful number, since it uses less digits than its factorization.

3657721948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914430491 (or 914430489 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 52.

The square root of 3657721948 is about 60479.1033994387. The cubic root of 3657721948 is about 1540.7667441765.

The spelling of 3657721948 in words is "three billion, six hundred fifty-seven million, seven hundred twenty-one thousand, nine hundred forty-eight".