1924245545 has 4 divisors (see below), whose sum is σ = 2309094660. Its totient is φ = 1539396432.

The previous prime is 1924245541. The next prime is 1924245553. The reversal of 1924245545 is 5455424291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5455424291 = 29 ⋅188118079.

It can be written as a sum of positive squares in 2 ways, for example, as 653109136 + 1271136409 = 25556^2 + 35653^2 .

It is a cyclic number.

It is not a de Polignac number, because 1924245545 - 2² = 1924245541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1924245541) 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, 192424550 + ... + 192424559.

It is an arithmetic number, because the mean of its divisors is an integer number (577273665).

Almost surely, 2^1924245545 is an apocalyptic number.

It is an amenable number.

1924245545 is a deficient number, since it is larger than the sum of its proper divisors (384849115).

1924245545 is an equidigital number, since it uses as much as digits as its factorization.

1924245545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384849114.

The product of its digits is 288000, while the sum is 41.

The square root of 1924245545 is about 43866.2232817005. The cubic root of 1924245545 is about 1243.8084318230.

The spelling of 1924245545 in words is "one billion, nine hundred twenty-four million, two hundred forty-five thousand, five hundred forty-five".