1051051566506 has 4 divisors (see below), whose sum is σ = 1576577349762. Its totient is φ = 525525783252.

The previous prime is 1051051566493. The next prime is 1051051566517. The reversal of 1051051566506 is 6056651501501.

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., 1050573750625 + 477815881 = 1024975^2 + 21859^2 .

It is a super-2 number, since 2×1051051566506² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262762891625 + ... + 262762891628.

Almost surely, 2^{1051051566506} is an apocalyptic number.

1051051566506 is a deficient number, since it is larger than the sum of its proper divisors (525525783256).

1051051566506 is an equidigital number, since it uses as much as digits as its factorization.

1051051566506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525525783255.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 1051051566506 in words is "one trillion, fifty-one billion, fifty-one million, five hundred sixty-six thousand, five hundred six".