97687488920478 has 128 divisors (see below), whose sum is σ = 203589109463040. Its totient is φ = 31225802373120.

The previous prime is 97687488920473. The next prime is 97687488920479. The reversal of 97687488920478 is 87402988478679.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 97687488920394 and 97687488920403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97687488920473) 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, 18442037926 + ... + 18442043222.

It is an arithmetic number, because the mean of its divisors is an integer number (1590539917680).

Almost surely, 2^{97687488920478} is an apocalyptic number.

97687488920478 is an abundant number, since it is smaller than the sum of its proper divisors (105901620542562).

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

97687488920478 is a wasteful number, since it uses less digits than its factorization.

97687488920478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9362.

The product of its (nonzero) digits is 21849440256, while the sum is 87.

The spelling of 97687488920478 in words is "ninety-seven trillion, six hundred eighty-seven billion, four hundred eighty-eight million, nine hundred twenty thousand, four hundred seventy-eight".