507388145378 has 4 divisors (see below), whose sum is σ = 761082218070. Its totient is φ = 253694072688.

The previous prime is 507388145371. The next prime is 507388145413. The reversal of 507388145378 is 873541883705.

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., 373031442169 + 134356703209 = 610763^2 + 366547^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (507388145371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126847036343 + ... + 126847036346.

Almost surely, 2^507388145378 is an apocalyptic number.

507388145378 is a deficient number, since it is larger than the sum of its proper divisors (253694072692).

507388145378 is a wasteful number, since it uses less digits than its factorization.

507388145378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253694072691.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 507388145378 in words is "five hundred seven billion, three hundred eighty-eight million, one hundred forty-five thousand, three hundred seventy-eight".