1023555054091 has 2 divisors, whose sum is σ = 1023555054092. Its totient is φ = 1023555054090.

The previous prime is 1023555054089. The next prime is 1023555054131. The reversal of 1023555054091 is 1904505553201.

It is an a-pointer prime, because the next prime (1023555054131) can be obtained adding 1023555054091 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1023555054091 - 2¹ = 1023555054089 is a prime.

Together with 1023555054089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1023555034091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511777527045 + 511777527046.

It is an arithmetic number, because the mean of its divisors is an integer number (511777527046).

Almost surely, 2^{1023555054091} is an apocalyptic number.

1023555054091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023555054091 is an equidigital number, since it uses as much as digits as its factorization.

1023555054091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 1023555054091 in words is "one trillion, twenty-three billion, five hundred fifty-five million, fifty-four thousand, ninety-one".