1378866325 has 6 divisors (see below), whose sum is σ = 1709794274. Its totient is φ = 1103093040.

The previous prime is 1378866323. The next prime is 1378866331. The reversal of 1378866325 is 5236688731.

It can be written as a sum of positive squares in 3 ways, for example, as 83010321 + 1295856004 = 9111^2 + 35998^2 .

It is not a de Polignac number, because 1378866325 - 2¹ = 1378866323 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 (1378866323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27577302 + ... + 27577351.

Almost surely, 2^1378866325 is an apocalyptic number.

It is an amenable number.

1378866325 is a deficient number, since it is larger than the sum of its proper divisors (330927949).

1378866325 is an equidigital number, since it uses as much as digits as its factorization.

1378866325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55154663 (or 55154658 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The square root of 1378866325 is about 37133.0893543750. The cubic root of 1378866325 is about 1113.0313280692.

The spelling of 1378866325 in words is "one billion, three hundred seventy-eight million, eight hundred sixty-six thousand, three hundred twenty-five".