1220405515355 has 32 divisors (see below), whose sum is σ = 1583760482304. Its totient is φ = 897444614016.

The previous prime is 1220405515331. The next prime is 1220405515367. The reversal of 1220405515355 is 5535155040221.

It is a cyclic number.

It is not a de Polignac number, because 1220405515355 - 2¹⁸ = 1220405253211 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21662954 + ... + 21719216.

It is an arithmetic number, because the mean of its divisors is an integer number (49492515072).

Almost surely, 2^{1220405515355} is an apocalyptic number.

1220405515355 is a deficient number, since it is larger than the sum of its proper divisors (363354966949).

1220405515355 is a wasteful number, since it uses less digits than its factorization.

1220405515355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57675.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 1220405515355 in words is "one trillion, two hundred twenty billion, four hundred five million, five hundred fifteen thousand, three hundred fifty-five".