55780533075531 has 8 divisors (see below), whose sum is σ = 81135320837184. Its totient is φ = 33806383682120.

The previous prime is 55780533075521. The next prime is 55780533075577. The reversal of 55780533075531 is 13557033508755.

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 55780533075531 - 2⁴² = 51382486564427 is a prime.

It is a super-2 number, since 2×55780533075531² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55780533075521) 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, 845159592021 + ... + 845159592086.

It is an arithmetic number, because the mean of its divisors is an integer number (10141915104648).

Almost surely, 2^{55780533075531} is an apocalyptic number.

55780533075531 is a deficient number, since it is larger than the sum of its proper divisors (25354787761653).

55780533075531 is a wasteful number, since it uses less digits than its factorization.

55780533075531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690319184121.

The product of its (nonzero) digits is 33075000, while the sum is 57.

The spelling of 55780533075531 in words is "fifty-five trillion, seven hundred eighty billion, five hundred thirty-three million, seventy-five thousand, five hundred thirty-one".