61298002791 has 12 divisors (see below), whose sum is σ = 88556175240. Its totient is φ = 40858589520.

The previous prime is 61298002789. The next prime is 61298002867. The reversal of 61298002791 is 19720089216.

61298002791 is a `hidden beast` number, since 612 + 9 + 8 + 0 + 0 + 27 + 9 + 1 = 666.

It is not a de Polignac number, because 61298002791 - 2¹ = 61298002789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61298002771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 504276 + ... + 613913.

It is an arithmetic number, because the mean of its divisors is an integer number (7379681270).

Almost surely, 2^61298002791 is an apocalyptic number.

61298002791 is a deficient number, since it is larger than the sum of its proper divisors (27258172449).

61298002791 is a wasteful number, since it uses less digits than its factorization.

61298002791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124286 (or 1124283 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 61298002791 in words is "sixty-one billion, two hundred ninety-eight million, two thousand, seven hundred ninety-one".