61161010000551 has 8 divisors (see below), whose sum is σ = 90608903704560. Its totient is φ = 40774006667016.

The previous prime is 61161010000513. The next prime is 61161010000567. The reversal of 61161010000551 is 15500001016116.

61161010000551 is a `hidden beast` number, since 6 + 1 + 1 + 6 + 1 + 0 + 100 + 0 + 0 + 551 = 666.

It is not a de Polignac number, because 61161010000551 - 2⁶ = 61161010000487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2265222592613 = 61161010000551 / (6 + 1 + 1 + 6 + 1 + 0 + 1 + 0 + 0 + 0 + 0 + 5 + 5 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61161010000511) 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, 1132611296280 + ... + 1132611296333.

It is an arithmetic number, because the mean of its divisors is an integer number (11326112963070).

Almost surely, 2^{61161010000551} is an apocalyptic number.

61161010000551 is a deficient number, since it is larger than the sum of its proper divisors (29447893704009).

61161010000551 is a wasteful number, since it uses less digits than its factorization.

61161010000551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2265222592622 (or 2265222592616 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

Adding to 61161010000551 its reverse (15500001016116), we get a palindrome (76661011016667).

The spelling of 61161010000551 in words is "sixty-one trillion, one hundred sixty-one billion, ten million, five hundred fifty-one", and thus it is an aban number.