1523440412434 has 4 divisors (see below), whose sum is σ = 2285160618654. Its totient is φ = 761720206216.

The previous prime is 1523440412423. The next prime is 1523440412489. The reversal of 1523440412434 is 4342140443251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1405896347025 + 117544065409 = 1185705^2 + 342847^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1523440412393 and 1523440412402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380860103107 + ... + 380860103110.

Almost surely, 2^{1523440412434} is an apocalyptic number.

1523440412434 is a deficient number, since it is larger than the sum of its proper divisors (761720206220).

1523440412434 is an equidigital number, since it uses as much as digits as its factorization.

1523440412434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761720206219.

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 1523440412434 its reverse (4342140443251), we get a palindrome (5865580855685).

The spelling of 1523440412434 in words is "one trillion, five hundred twenty-three billion, four hundred forty million, four hundred twelve thousand, four hundred thirty-four".