1678838551 has 12 divisors (see below), whose sum is σ = 1851094168. Its totient is φ = 1512784224.

The previous prime is 1678838533. The next prime is 1678838561. The reversal of 1678838551 is 1558388761.

It is a happy number.

It is not a de Polignac number, because 1678838551 - 2¹⁵ = 1678805783 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 (1678838561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 967881 + ... + 969613.

Almost surely, 2^1678838551 is an apocalyptic number.

1678838551 is a deficient number, since it is larger than the sum of its proper divisors (172255617).

1678838551 is an frugal number, since it uses more digits than its factorization.

1678838551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3522 (or 1789 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 52.

The square root of 1678838551 is about 40973.6323871829. The cubic root of 1678838551 is about 1188.5103765161.

The spelling of 1678838551 in words is "one billion, six hundred seventy-eight million, eight hundred thirty-eight thousand, five hundred fifty-one".