7381720055 has 8 divisors (see below), whose sum is σ = 8944065312. Its totient is φ = 5848041888.

The previous prime is 7381720051. The next prime is 7381720063. The reversal of 7381720055 is 5500271837.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7381720055 - 2² = 7381720051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7381720051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7166204 + ... + 7167233.

It is an arithmetic number, because the mean of its divisors is an integer number (1118008164).

Almost surely, 2^7381720055 is an apocalyptic number.

7381720055 is a deficient number, since it is larger than the sum of its proper divisors (1562345257).

7381720055 is a wasteful number, since it uses less digits than its factorization.

7381720055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14333545.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 7381720055 is about 85916.9369507549. The cubic root of 7381720055 is about 1947.0892408878.

The spelling of 7381720055 in words is "seven billion, three hundred eighty-one million, seven hundred twenty thousand, fifty-five".