1555747242091 has 8 divisors (see below), whose sum is σ = 1785761028320. Its totient is φ = 1327674500928.

The previous prime is 1555747242079. The next prime is 1555747242113. The reversal of 1555747242091 is 1902427475551.

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 1555747242091 - 2⁹ = 1555747241579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1555747242011) 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, 485259546 + ... + 485262751.

It is an arithmetic number, because the mean of its divisors is an integer number (223220128540).

Almost surely, 2^{1555747242091} is an apocalyptic number.

1555747242091 is a deficient number, since it is larger than the sum of its proper divisors (230013786229).

1555747242091 is an equidigital number, since it uses as much as digits as its factorization.

1555747242091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970522533.

The product of its (nonzero) digits is 3528000, while the sum is 52.

The spelling of 1555747242091 in words is "one trillion, five hundred fifty-five billion, seven hundred forty-seven million, two hundred forty-two thousand, ninety-one".