1861506744053 has 32 divisors (see below), whose sum is σ = 2178296064000. Its totient is φ = 1571929931520.

The previous prime is 1861506744037. The next prime is 1861506744073. The reversal of 1861506744053 is 3504476051681.

It is not a de Polignac number, because 1861506744053 - 2⁴ = 1861506744037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1861506743992 and 1861506744010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861506744073) 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, 38075138 + ... + 38123996.

It is an arithmetic number, because the mean of its divisors is an integer number (68071752000).

Almost surely, 2^{1861506744053} is an apocalyptic number.

It is an amenable number.

1861506744053 is a deficient number, since it is larger than the sum of its proper divisors (316789319947).

1861506744053 is a wasteful number, since it uses less digits than its factorization.

1861506744053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51545.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 1861506744053 in words is "one trillion, eight hundred sixty-one billion, five hundred six million, seven hundred forty-four thousand, fifty-three".