61097766901 has 2 divisors, whose sum is σ = 61097766902. Its totient is φ = 61097766900.

The previous prime is 61097766887. The next prime is 61097766967. The reversal of 61097766901 is 10966779016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55644092100 + 5453674801 = 235890^2 + 73849^2 .

It is a cyclic number.

It is not a de Polignac number, because 61097766901 - 2³³ = 52507832309 is a prime.

It is a super-2 number, since 2×61097766901² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61097766971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30548883450 + 30548883451.

It is an arithmetic number, because the mean of its divisors is an integer number (30548883451).

Almost surely, 2^61097766901 is an apocalyptic number.

It is an amenable number.

61097766901 is a deficient number, since it is larger than the sum of its proper divisors (1).

61097766901 is an equidigital number, since it uses as much as digits as its factorization.

61097766901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 857304, while the sum is 52.

The spelling of 61097766901 in words is "sixty-one billion, ninety-seven million, seven hundred sixty-six thousand, nine hundred one".