513555104355442 has 4 divisors (see below), whose sum is σ = 770332656533166. Its totient is φ = 256777552177720.

The previous prime is 513555104355439. The next prime is 513555104355481. The reversal of 513555104355442 is 244553401555315.

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., 512973531868561 + 581572486881 = 22648919^2 + 762609^2 .

It is a super-3 number, since 3×513555104355442³ (a number of 45 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 513555104355442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128388776088859 + ... + 128388776088862.

Almost surely, 2^{513555104355442} is an apocalyptic number.

513555104355442 is a deficient number, since it is larger than the sum of its proper divisors (256777552177724).

513555104355442 is a wasteful number, since it uses less digits than its factorization.

513555104355442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256777552177723.

The product of its (nonzero) digits is 18000000, while the sum is 52.

The spelling of 513555104355442 in words is "five hundred thirteen trillion, five hundred fifty-five billion, one hundred four million, three hundred fifty-five thousand, four hundred forty-two".