88196305781 has 2 divisors, whose sum is σ = 88196305782. Its totient is φ = 88196305780.

The previous prime is 88196305763. The next prime is 88196305801. The reversal of 88196305781 is 18750369188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77748399556 + 10447906225 = 278834^2 + 102215^2 .

It is a cyclic number.

It is not a de Polignac number, because 88196305781 - 2²² = 88192111477 is a prime.

It is a super-2 number, since 2×88196305781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88196305741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44098152890 + 44098152891.

It is an arithmetic number, because the mean of its divisors is an integer number (44098152891).

Almost surely, 2^88196305781 is an apocalyptic number.

It is an amenable number.

88196305781 is a deficient number, since it is larger than the sum of its proper divisors (1).

88196305781 is an equidigital number, since it uses as much as digits as its factorization.

88196305781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 88196305781 in words is "eighty-eight billion, one hundred ninety-six million, three hundred five thousand, seven hundred eighty-one".