55275377455661 has 8 divisors (see below), whose sum is σ = 60513487433184. Its totient is φ = 50072780088720.

The previous prime is 55275377455643. The next prime is 55275377455679. The reversal of 55275377455661 is 16655477357255.

It is an interprime number because it is at equal distance from previous prime (55275377455643) and next prime (55275377455679).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55275377455661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55275377455591 and 55275377455600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55275377457661) 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, 8878149386 + ... + 8878155611.

It is an arithmetic number, because the mean of its divisors is an integer number (7564185929148).

Almost surely, 2^{55275377455661} is an apocalyptic number.

It is an amenable number.

55275377455661 is a deficient number, since it is larger than the sum of its proper divisors (5238109977523).

55275377455661 is a wasteful number, since it uses less digits than its factorization.

55275377455661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17756305291.

The product of its digits is 926100000, while the sum is 68.

The spelling of 55275377455661 in words is "fifty-five trillion, two hundred seventy-five billion, three hundred seventy-seven million, four hundred fifty-five thousand, six hundred sixty-one".