1220294867638 has 16 divisors (see below), whose sum is σ = 2282109882624. Its totient is φ = 475439558760.

The previous prime is 1220294867599. The next prime is 1220294867641. The reversal of 1220294867638 is 8367684920221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3961996170 + ... + 3961996477.

It is an arithmetic number, because the mean of its divisors is an integer number (142631867664).

Almost surely, 2^{1220294867638} is an apocalyptic number.

1220294867638 is a deficient number, since it is larger than the sum of its proper divisors (1061815014986).

1220294867638 is a wasteful number, since it uses less digits than its factorization.

1220294867638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7923992667.

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 1220294867638 in words is "one trillion, two hundred twenty billion, two hundred ninety-four million, eight hundred sixty-seven thousand, six hundred thirty-eight".