1220770861684 has 24 divisors (see below), whose sum is σ = 2351943871200. Its totient is φ = 549805056480.

The previous prime is 1220770861631. The next prime is 1220770861711. The reversal of 1220770861684 is 4861680770221.

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, 127264894 + ... + 127274485.

It is an arithmetic number, because the mean of its divisors is an integer number (97997661300).

Almost surely, 2^{1220770861684} is an apocalyptic number.

It is an amenable number.

1220770861684 is a deficient number, since it is larger than the sum of its proper divisors (1131173009516).

1220770861684 is a wasteful number, since it uses less digits than its factorization.

1220770861684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254539503 (or 254539501 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 1220770861684 in words is "one trillion, two hundred twenty billion, seven hundred seventy million, eight hundred sixty-one thousand, six hundred eighty-four".