55145138737 has 12 divisors (see below), whose sum is σ = 62677220340. Its totient is φ = 48224084832.

The previous prime is 55145138731. The next prime is 55145138753. The reversal of 55145138737 is 73783154155.

It can be written as a sum of positive squares in 2 ways, for example, as 12498345616 + 42646793121 = 111796^2 + 206511^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55145138737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55145138731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5870562 + ... + 5879947.

It is an arithmetic number, because the mean of its divisors is an integer number (5223101695).

Almost surely, 2^55145138737 is an apocalyptic number.

It is an amenable number.

55145138737 is a deficient number, since it is larger than the sum of its proper divisors (7532081603).

55145138737 is a wasteful number, since it uses less digits than its factorization.

55145138737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11750560 (or 11750541 counting only the distinct ones).

The product of its digits is 1764000, while the sum is 49.

The spelling of 55145138737 in words is "fifty-five billion, one hundred forty-five million, one hundred thirty-eight thousand, seven hundred thirty-seven".