55785611507 has 8 divisors (see below), whose sum is σ = 56556114384. Its totient is φ = 55015279488.

The previous prime is 55785611477. The next prime is 55785611543. The reversal of 55785611507 is 70511658755.

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

It is a cyclic number.

It is not a de Polignac number, because 55785611507 - 2²² = 55781417203 is a prime.

It is a super-2 number, since 2×55785611507² (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 (55785611597) 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, 704303 + ... + 779495.

It is an arithmetic number, because the mean of its divisors is an integer number (7069514298).

Almost surely, 2^55785611507 is an apocalyptic number.

55785611507 is a deficient number, since it is larger than the sum of its proper divisors (770502877).

55785611507 is a wasteful number, since it uses less digits than its factorization.

55785611507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85429.

The product of its (nonzero) digits is 1470000, while the sum is 50.

The spelling of 55785611507 in words is "fifty-five billion, seven hundred eighty-five million, six hundred eleven thousand, five hundred seven".