55439780707 has 16 divisors (see below), whose sum is σ = 59427762912. Its totient is φ = 51534766080.

The previous prime is 55439780663. The next prime is 55439780717. The reversal of 55439780707 is 70708793455.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55439780707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55439780717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 775423 + ... + 843895.

It is an arithmetic number, because the mean of its divisors is an integer number (3714235182).

Almost surely, 2^55439780707 is an apocalyptic number.

55439780707 is a deficient number, since it is larger than the sum of its proper divisors (3987982205).

55439780707 is a wasteful number, since it uses less digits than its factorization.

55439780707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69078.

The product of its (nonzero) digits is 7408800, while the sum is 55.

The spelling of 55439780707 in words is "fifty-five billion, four hundred thirty-nine million, seven hundred eighty thousand, seven hundred seven".