3781564797 has 4 divisors (see below), whose sum is σ = 5042086400. Its totient is φ = 2521043196.

The previous prime is 3781564793. The next prime is 3781564799. The reversal of 3781564797 is 7974651873.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3781564797 - 2² = 3781564793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781564793) 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 3 ways as a sum of consecutive naturals, for example, 630260797 + ... + 630260802.

It is an arithmetic number, because the mean of its divisors is an integer number (1260521600).

Almost surely, 2^3781564797 is an apocalyptic number.

It is an amenable number.

3781564797 is a deficient number, since it is larger than the sum of its proper divisors (1260521603).

3781564797 is a wasteful number, since it uses less digits than its factorization.

3781564797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260521602.

The product of its digits is 8890560, while the sum is 57.

The square root of 3781564797 is about 61494.4289915761. The cubic root of 3781564797 is about 1557.9631532607.

The spelling of 3781564797 in words is "three billion, seven hundred eighty-one million, five hundred sixty-four thousand, seven hundred ninety-seven".