1780407145 has 16 divisors (see below), whose sum is σ = 2335739328. Its totient is φ = 1292050240.

The previous prime is 1780407137. The next prime is 1780407149. The reversal of 1780407145 is 5417040871.

It is not a de Polignac number, because 1780407145 - 2³ = 1780407137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1780407149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8974 + ... + 60343.

It is an arithmetic number, because the mean of its divisors is an integer number (145983708).

Almost surely, 2^1780407145 is an apocalyptic number.

It is an amenable number.

1780407145 is a deficient number, since it is larger than the sum of its proper divisors (555332183).

1780407145 is a wasteful number, since it uses less digits than its factorization.

1780407145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69800.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 1780407145 is about 42194.8710745749. The cubic root of 1780407145 is about 1212.0106690217.

The spelling of 1780407145 in words is "one billion, seven hundred eighty million, four hundred seven thousand, one hundred forty-five".