61000099999551 has 12 divisors (see below), whose sum is σ = 88112155822600. Its totient is φ = 40666317824880.

The previous prime is 61000099999547. The next prime is 61000099999561. The reversal of 61000099999551 is 15599999000016.

61000099999551 is a `hidden beast` number, since 610 + 0 + 0 + 0 + 9 + 9 + 9 + 9 + 9 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 61000099999551 - 2² = 61000099999547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61000099999541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33694576 + ... + 35458773.

Almost surely, 2^{61000099999551} is an apocalyptic number.

61000099999551 is a deficient number, since it is larger than the sum of its proper divisors (27112055823049).

61000099999551 is a wasteful number, since it uses less digits than its factorization.

61000099999551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69251366 (or 69251363 counting only the distinct ones).

The product of its (nonzero) digits is 8857350, while the sum is 63.

The spelling of 61000099999551 in words is "sixty-one trillion, ninety-nine million, nine hundred ninety-nine thousand, five hundred fifty-one".