107778448551 has 4 divisors (see below), whose sum is σ = 143704598072. Its totient is φ = 71852299032.

The previous prime is 107778448543. The next prime is 107778448553. The reversal of 107778448551 is 155844877701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155844877701 = 3 ⋅51948292567.

It is not a de Polignac number, because 107778448551 - 2³ = 107778448543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 107778448491 and 107778448500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107778448553) 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, 17963074756 + ... + 17963074761.

It is an arithmetic number, because the mean of its divisors is an integer number (35926149518).

Almost surely, 2^107778448551 is an apocalyptic number.

107778448551 is a deficient number, since it is larger than the sum of its proper divisors (35926149521).

107778448551 is an equidigital number, since it uses as much as digits as its factorization.

107778448551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35926149520.

The product of its (nonzero) digits is 8780800, while the sum is 57.

The spelling of 107778448551 in words is "one hundred seven billion, seven hundred seventy-eight million, four hundred forty-eight thousand, five hundred fifty-one".