97691806545 has 16 divisors (see below), whose sum is σ = 156317098560. Its totient is φ = 52098894144.

The previous prime is 97691806543. The next prime is 97691806547. The reversal of 97691806545 is 54560819679.

It is an interprime number because it is at equal distance from previous prime (97691806543) and next prime (97691806547).

It is not a de Polignac number, because 97691806545 - 2¹ = 97691806543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97691806543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33891 + ... + 443319.

It is an arithmetic number, because the mean of its divisors is an integer number (9769818660).

Almost surely, 2^97691806545 is an apocalyptic number.

It is an amenable number.

97691806545 is a deficient number, since it is larger than the sum of its proper divisors (58625292015).

97691806545 is a wasteful number, since it uses less digits than its factorization.

97691806545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425344.

The product of its (nonzero) digits is 16329600, while the sum is 60.

The spelling of 97691806545 in words is "ninety-seven billion, six hundred ninety-one million, eight hundred six thousand, five hundred forty-five".