1678862401 has 4 divisors (see below), whose sum is σ = 1767223600. Its totient is φ = 1590501204.

The previous prime is 1678862399. The next prime is 1678862407. The reversal of 1678862401 is 1042688761.

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 a cyclic number.

It is not a de Polignac number, because 1678862401 - 2¹ = 1678862399 is a prime.

It is a super-2 number, since 2×1678862401² = 5637157922982969602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1678862407) 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, 44180571 + ... + 44180608.

It is an arithmetic number, because the mean of its divisors is an integer number (441805900).

Almost surely, 2^1678862401 is an apocalyptic number.

It is an amenable number.

1678862401 is a deficient number, since it is larger than the sum of its proper divisors (88361199).

1678862401 is an equidigital number, since it uses as much as digits as its factorization.

1678862401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88361198.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 1678862401 is about 40973.9234269798. The cubic root of 1678862401 is about 1188.5160045813.

The spelling of 1678862401 in words is "one billion, six hundred seventy-eight million, eight hundred sixty-two thousand, four hundred one".