1778412145 has 8 divisors (see below), whose sum is σ = 2143025280. Its totient is φ = 1416775920.

The previous prime is 1778412127. The next prime is 1778412241. The reversal of 1778412145 is 5412148771.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1778412145 - 2¹¹ = 1778410097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1778412098 and 1778412107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742911 + ... + 745300.

It is an arithmetic number, because the mean of its divisors is an integer number (267878160).

Almost surely, 2^1778412145 is an apocalyptic number.

It is an amenable number.

1778412145 is a deficient number, since it is larger than the sum of its proper divisors (364613135).

1778412145 is a wasteful number, since it uses less digits than its factorization.

1778412145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488455.

The product of its digits is 62720, while the sum is 40.

The square root of 1778412145 is about 42171.2241344735. The cubic root of 1778412145 is about 1211.5578016374.

It can be divided in two parts, 17784 and 12145, that added together give a square (29929 = 173²).

The spelling of 1778412145 in words is "one billion, seven hundred seventy-eight million, four hundred twelve thousand, one hundred forty-five".