97607654781 has 64 divisors (see below), whose sum is σ = 161518103040. Its totient is φ = 51055764480.

The previous prime is 97607654779. The next prime is 97607654789. The reversal of 97607654781 is 18745670679.

It is not a de Polignac number, because 97607654781 - 2¹ = 97607654779 is a prime.

It is a super-2 number, since 2×97607654781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97607654789) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19880955 + ... + 19885863.

It is an arithmetic number, because the mean of its divisors is an integer number (2523720360).

Almost surely, 2^97607654781 is an apocalyptic number.

97607654781 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

97607654781 is a deficient number, since it is larger than the sum of its proper divisors (63910448259).

97607654781 is a wasteful number, since it uses less digits than its factorization.

97607654781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5526.

The product of its (nonzero) digits is 17781120, while the sum is 60.

The spelling of 97607654781 in words is "ninety-seven billion, six hundred seven million, six hundred fifty-four thousand, seven hundred eighty-one".