1055578103391 has 32 divisors (see below), whose sum is σ = 1660475895808. Its totient is φ = 583698597120.

The previous prime is 1055578103369. The next prime is 1055578103407. The reversal of 1055578103391 is 1933018755501.

It is not a de Polignac number, because 1055578103391 - 2¹³ = 1055578095199 is a prime.

It is a super-2 number, since 2×1055578103391² (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 1055578103391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055578103341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17711955 + ... + 17771451.

It is an arithmetic number, because the mean of its divisors is an integer number (51889871744).

Almost surely, 2^{1055578103391} is an apocalyptic number.

1055578103391 is a deficient number, since it is larger than the sum of its proper divisors (604897792417).

1055578103391 is a wasteful number, since it uses less digits than its factorization.

1055578103391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86791.

The product of its (nonzero) digits is 567000, while the sum is 48.

The spelling of 1055578103391 in words is "one trillion, fifty-five billion, five hundred seventy-eight million, one hundred three thousand, three hundred ninety-one".