55956373787 has 4 divisors (see below), whose sum is σ = 55957958376. Its totient is φ = 55954789200.

The previous prime is 55956373777. The next prime is 55956373813. The reversal of 55956373787 is 78737365955.

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

It is a cyclic number.

It is not a de Polignac number, because 55956373787 - 2¹⁶ = 55956308251 is a prime.

It is a super-2 number, since 2×55956373787² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55956373717) 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, 738089 + ... + 810362.

It is an arithmetic number, because the mean of its divisors is an integer number (13989489594).

Almost surely, 2^55956373787 is an apocalyptic number.

55956373787 is a deficient number, since it is larger than the sum of its proper divisors (1584589).

55956373787 is a wasteful number, since it uses less digits than its factorization.

55956373787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584588.

The product of its digits is 166698000, while the sum is 65.

The spelling of 55956373787 in words is "fifty-five billion, nine hundred fifty-six million, three hundred seventy-three thousand, seven hundred eighty-seven".