55170787533 has 4 divisors (see below), whose sum is σ = 73561050048. Its totient is φ = 36780525020.

The previous prime is 55170787471. The next prime is 55170787583. The reversal of 55170787533 is 33578707155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55170787533 - 2¹³ = 55170779341 is a prime.

It is a super-2 number, since 2×55170787533² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55170787583) 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, 9195131253 + ... + 9195131258.

It is an arithmetic number, because the mean of its divisors is an integer number (18390262512).

Almost surely, 2^55170787533 is an apocalyptic number.

It is an amenable number.

55170787533 is a deficient number, since it is larger than the sum of its proper divisors (18390262515).

55170787533 is a wasteful number, since it uses less digits than its factorization.

55170787533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18390262514.

The product of its (nonzero) digits is 3087000, while the sum is 51.

The spelling of 55170787533 in words is "fifty-five billion, one hundred seventy million, seven hundred eighty-seven thousand, five hundred thirty-three".