1055400506819 has 4 divisors (see below), whose sum is σ = 1079944704696. Its totient is φ = 1030856308944.

The previous prime is 1055400506807. The next prime is 1055400506891. The reversal of 1055400506819 is 9186050045501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1055400506819 is a prime.

It is a super-2 number, since 2×1055400506819² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1055400506819.

It is not an unprimeable number, because it can be changed into a prime (1055400506899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12272098874 + ... + 12272098959.

It is an arithmetic number, because the mean of its divisors is an integer number (269986176174).

Almost surely, 2^{1055400506819} is an apocalyptic number.

1055400506819 is a deficient number, since it is larger than the sum of its proper divisors (24544197877).

1055400506819 is an equidigital number, since it uses as much as digits as its factorization.

1055400506819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24544197876.

The product of its (nonzero) digits is 216000, while the sum is 44.

The spelling of 1055400506819 in words is "one trillion, fifty-five billion, four hundred million, five hundred six thousand, eight hundred nineteen".