513154245354442 has 4 divisors (see below), whose sum is σ = 769731368031666. Its totient is φ = 256577122677220.

The previous prime is 513154245354391. The next prime is 513154245354449. The reversal of 513154245354442 is 244453542451315.

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., 502664426392041 + 10489818962401 = 22420179^2 + 3238799^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 513154245354442.

It is not an unprimeable number, because it can be changed into a prime (513154245354449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128288561338609 + ... + 128288561338612.

Almost surely, 2^{513154245354442} is an apocalyptic number.

513154245354442 is a deficient number, since it is larger than the sum of its proper divisors (256577122677224).

513154245354442 is a wasteful number, since it uses less digits than its factorization.

513154245354442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256577122677223.

The product of its digits is 23040000, while the sum is 52.

The spelling of 513154245354442 in words is "five hundred thirteen trillion, one hundred fifty-four billion, two hundred forty-five million, three hundred fifty-four thousand, four hundred forty-two".