99490610061 has 12 divisors (see below), whose sum is σ = 144242895420. Its totient is φ = 66080502720.

The previous prime is 99490610057. The next prime is 99490610071. The reversal of 99490610061 is 16001609499.

99490610061 is a `hidden beast` number, since 99 + 490 + 6 + 10 + 0 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31958712900 + 67531897161 = 178770^2 + 259869^2 .

It is not a de Polignac number, because 99490610061 - 2² = 99490610057 is a prime.

It is a super-4 number, since 4×99490610061⁴ (a number of 45 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99490609989 and 99490610016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99490610071) 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, 20545000 + ... + 20549841.

It is an arithmetic number, because the mean of its divisors is an integer number (12020241285).

Almost surely, 2^99490610061 is an apocalyptic number.

It is an amenable number.

99490610061 is a deficient number, since it is larger than the sum of its proper divisors (44752285359).

99490610061 is a wasteful number, since it uses less digits than its factorization.

99490610061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41095116 (or 41095113 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 99490610061 in words is "ninety-nine billion, four hundred ninety million, six hundred ten thousand, sixty-one".