4221646415778 has 32 divisors (see below), whose sum is σ = 9210944984832. Its totient is φ = 1279275670800.

The previous prime is 4221646415759. The next prime is 4221646415797. The reversal of 4221646415778 is 8775146461224.

It is an interprime number because it is at equal distance from previous prime (4221646415759) and next prime (4221646415797).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10529733 + ... + 10923303.

It is an arithmetic number, because the mean of its divisors is an integer number (287842030776).

Almost surely, 2^{4221646415778} is an apocalyptic number.

4221646415778 is an abundant number, since it is smaller than the sum of its proper divisors (4989298569054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4221646415778 is a wasteful number, since it uses less digits than its factorization.

4221646415778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556110.

The product of its digits is 18063360, while the sum is 57.

The spelling of 4221646415778 in words is "four trillion, two hundred twenty-one billion, six hundred forty-six million, four hundred fifteen thousand, seven hundred seventy-eight".