1225784435738 has 16 divisors (see below), whose sum is σ = 1987758546720. Its totient is φ = 564941901456.

The previous prime is 1225784435737. The next prime is 1225784435767. The reversal of 1225784435738 is 8375344875221.

It is not an unprimeable number, because it can be changed into a prime (1225784435737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435910556 + ... + 435913367.

It is an arithmetic number, because the mean of its divisors is an integer number (124234909170).

Almost surely, 2^{1225784435738} is an apocalyptic number.

1225784435738 is a deficient number, since it is larger than the sum of its proper divisors (761974110982).

1225784435738 is a wasteful number, since it uses less digits than its factorization.

1225784435738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871823981.

The product of its digits is 45158400, while the sum is 59.

The spelling of 1225784435738 in words is "one trillion, two hundred twenty-five billion, seven hundred eighty-four million, four hundred thirty-five thousand, seven hundred thirty-eight".