2145277407 has 64 divisors (see below), whose sum is σ = 3759759360. Its totient is φ = 1057190400.

The previous prime is 2145277391. The next prime is 2145277451. The reversal of 2145277407 is 7047725412.

It is not a de Polignac number, because 2145277407 - 2⁴ = 2145277391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145277307) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 241057 + ... + 249797.

It is an arithmetic number, because the mean of its divisors is an integer number (58746240).

Almost surely, 2^2145277407 is an apocalyptic number.

2145277407 is a deficient number, since it is larger than the sum of its proper divisors (1614481953).

2145277407 is a wasteful number, since it uses less digits than its factorization.

2145277407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8824.

The product of its (nonzero) digits is 109760, while the sum is 39.

The square root of 2145277407 is about 46317.1394518271. The cubic root of 2145277407 is about 1289.7171839595.

The spelling of 2145277407 in words is "two billion, one hundred forty-five million, two hundred seventy-seven thousand, four hundred seven".