97791045840 has 60 divisors (see below), whose sum is σ = 328414931364. Its totient is φ = 26077612032.

The previous prime is 97791045829. The next prime is 97791045851. The reversal of 97791045840 is 4854019779.

It is an interprime number because it is at equal distance from previous prime (97791045829) and next prime (97791045851).

It can be written as a sum of positive squares in 2 ways, for example, as 21177234576 + 76613811264 = 145524^2 + 276792^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67909729 + ... + 67911168.

Almost surely, 2^97791045840 is an apocalyptic number.

97791045840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

97791045840 is an abundant number, since it is smaller than the sum of its proper divisors (230623885524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97791045840 is a wasteful number, since it uses less digits than its factorization.

97791045840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135820916 (or 135820907 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 97791045840 in words is "ninety-seven billion, seven hundred ninety-one million, forty-five thousand, eight hundred forty".