2155503566642 has 16 divisors (see below), whose sum is σ = 3236274663552. Its totient is φ = 1076745552480.

The previous prime is 2155503566617. The next prime is 2155503566653. The reversal of 2155503566642 is 2466653055512.

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, 23183267 + ... + 23276057.

It is an arithmetic number, because the mean of its divisors is an integer number (202267166472).

Almost surely, 2^{2155503566642} is an apocalyptic number.

2155503566642 is a deficient number, since it is larger than the sum of its proper divisors (1080771096910).

2155503566642 is a wasteful number, since it uses less digits than its factorization.

2155503566642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103513.

The product of its (nonzero) digits is 6480000, while the sum is 50.

The spelling of 2155503566642 in words is "two trillion, one hundred fifty-five billion, five hundred three million, five hundred sixty-six thousand, six hundred forty-two".