1861432053 has 8 divisors (see below), whose sum is σ = 2672825568. Its totient is φ = 1145496624.

The previous prime is 1861432009. The next prime is 1861432057. The reversal of 1861432053 is 3502341681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1861432053 - 2¹⁰ = 1861431029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861432057) 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, 23864475 + ... + 23864552.

It is an arithmetic number, because the mean of its divisors is an integer number (334103196).

Almost surely, 2^1861432053 is an apocalyptic number.

1861432053 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1861432053 is a deficient number, since it is larger than the sum of its proper divisors (811393515).

1861432053 is a wasteful number, since it uses less digits than its factorization.

1861432053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47729043.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1861432053 is about 43144.3165782007. The cubic root of 1861432053 is about 1230.1244840630.

The spelling of 1861432053 in words is "one billion, eight hundred sixty-one million, four hundred thirty-two thousand, fifty-three".