55415405541778 has 8 divisors (see below), whose sum is σ = 83167112081340. Its totient is φ = 27693034848000.

The previous prime is 55415405541763. The next prime is 55415405541779. The reversal of 55415405541778 is 87714550451455.

It can be written as a sum of positive squares in 2 ways, for example, as 49087076651089 + 6328328890689 = 7006217^2 + 2515617^2 .

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

It is not an unprimeable number, because it can be changed into a prime (55415405541779) 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, 7333956723 + ... + 7333964278.

Almost surely, 2^{55415405541778} is an apocalyptic number.

55415405541778 is a deficient number, since it is larger than the sum of its proper divisors (27751706539562).

55415405541778 is a wasteful number, since it uses less digits than its factorization.

55415405541778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14667922892.

The product of its (nonzero) digits is 78400000, while the sum is 61.

The spelling of 55415405541778 in words is "fifty-five trillion, four hundred fifteen billion, four hundred five million, five hundred forty-one thousand, seven hundred seventy-eight".