1212651642506 has 32 divisors (see below), whose sum is σ = 1858295649600. Its totient is φ = 593363900800.

The previous prime is 1212651642493. The next prime is 1212651642509. The reversal of 1212651642506 is 6052461562121.

It is not an unprimeable number, because it can be changed into a prime (1212651642509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57573005 + ... + 57594063.

It is an arithmetic number, because the mean of its divisors is an integer number (58071739050).

Almost surely, 2^{1212651642506} is an apocalyptic number.

1212651642506 is a deficient number, since it is larger than the sum of its proper divisors (645644007094).

1212651642506 is a wasteful number, since it uses less digits than its factorization.

1212651642506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24454.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 1212651642506 in words is "one trillion, two hundred twelve billion, six hundred fifty-one million, six hundred forty-two thousand, five hundred six".