1380648551 has 4 divisors (see below), whose sum is σ = 1380958992. Its totient is φ = 1380338112.

The previous prime is 1380648541. The next prime is 1380648553. The reversal of 1380648551 is 1558460831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1558460831 = 37 ⋅42120563.

It is a cyclic number.

It is not a de Polignac number, because 1380648551 - 2¹⁴ = 1380632167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1380648499 and 1380648508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380648553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148451 + ... + 157476.

It is an arithmetic number, because the mean of its divisors is an integer number (345239748).

Almost surely, 2^1380648551 is an apocalyptic number.

1380648551 is a deficient number, since it is larger than the sum of its proper divisors (310441).

1380648551 is an equidigital number, since it uses as much as digits as its factorization.

1380648551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310440.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 1380648551 is about 37157.0794196745. The cubic root of 1380648551 is about 1113.5106637129.

The spelling of 1380648551 in words is "one billion, three hundred eighty million, six hundred forty-eight thousand, five hundred fifty-one".