5551610165145 has 144 divisors (see below), whose sum is σ = 10724986031760. Its totient is φ = 2654224404480.

The previous prime is 5551610165117. The next prime is 5551610165197. The reversal of 5551610165145 is 5415610161555.

5551610165145 is a `hidden beast` number, since 5 + 5 + 5 + 1 + 610 + 16 + 5 + 14 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1642194576 + 5549967970569 = 40524^2 + 2355837^2 .

It is not a de Polignac number, because 5551610165145 - 2⁶ = 5551610165081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5551610165145.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 180742309 + ... + 180773021.

It is an arithmetic number, because the mean of its divisors is an integer number (74479069665).

Almost surely, 2^{5551610165145} is an apocalyptic number.

5551610165145 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5551610165145 is a deficient number, since it is larger than the sum of its proper divisors (5173375866615).

5551610165145 is a wasteful number, since it uses less digits than its factorization.

5551610165145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31208 (or 31194 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 45.

The spelling of 5551610165145 in words is "five trillion, five hundred fifty-one billion, six hundred ten million, one hundred sixty-five thousand, one hundred forty-five".