1020506605838 has 4 divisors (see below), whose sum is σ = 1530759908760. Its totient is φ = 510253302918.

The previous prime is 1020506605793. The next prime is 1020506605883. The reversal of 1020506605838 is 8385066050201.

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

It is an interprime number because it is at equal distance from previous prime (1020506605793) and next prime (1020506605883).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255126651458 + ... + 255126651461.

It is an arithmetic number, because the mean of its divisors is an integer number (382689977190).

Almost surely, 2^{1020506605838} is an apocalyptic number.

1020506605838 is a deficient number, since it is larger than the sum of its proper divisors (510253302922).

1020506605838 is an equidigital number, since it uses as much as digits as its factorization.

1020506605838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510253302921.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 1020506605838 in words is "one trillion, twenty billion, five hundred six million, six hundred five thousand, eight hundred thirty-eight".