2505866742836 has 6 divisors (see below), whose sum is σ = 4385266799970. Its totient is φ = 1252933371416.

The previous prime is 2505866742791. The next prime is 2505866742839. The reversal of 2505866742836 is 6382476685052.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2499149956900 + 6716785936 = 1580870^2 + 81956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505866742839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313233342851 + ... + 313233342858.

It is an arithmetic number, because the mean of its divisors is an integer number (730877799995).

Almost surely, 2^{2505866742836} is an apocalyptic number.

It is an amenable number.

2505866742836 is a deficient number, since it is larger than the sum of its proper divisors (1879400057134).

2505866742836 is a wasteful number, since it uses less digits than its factorization.

2505866742836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626466685713 (or 626466685711 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 62.

The spelling of 2505866742836 in words is "two trillion, five hundred five billion, eight hundred sixty-six million, seven hundred forty-two thousand, eight hundred thirty-six".