2720655220155 has 16 divisors (see below), whose sum is σ = 4371261949440. Its totient is φ = 1444944918368.

The previous prime is 2720655220121. The next prime is 2720655220159. The reversal of 2720655220155 is 5510225560272.

It is a cyclic number.

It is not a de Polignac number, because 2720655220155 - 2⁶ = 2720655220091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2720655220159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379446237 + ... + 379453406.

It is an arithmetic number, because the mean of its divisors is an integer number (273203871840).

Almost surely, 2^{2720655220155} is an apocalyptic number.

2720655220155 is a deficient number, since it is larger than the sum of its proper divisors (1650606729285).

2720655220155 is a wasteful number, since it uses less digits than its factorization.

2720655220155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758899890.

The product of its (nonzero) digits is 420000, while the sum is 42.

The spelling of 2720655220155 in words is "two trillion, seven hundred twenty billion, six hundred fifty-five million, two hundred twenty thousand, one hundred fifty-five".