97855390658 has 4 divisors (see below), whose sum is σ = 146783085990. Its totient is φ = 48927695328.

The previous prime is 97855390631. The next prime is 97855390663. The reversal of 97855390658 is 85609355879.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50277747529 + 47577643129 = 224227^2 + 218123^2 .

It is a junction number, because it is equal to n+sod(n) for n = 97855390594 and 97855390603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24463847663 + ... + 24463847666.

Almost surely, 2^97855390658 is an apocalyptic number.

97855390658 is a deficient number, since it is larger than the sum of its proper divisors (48927695332).

97855390658 is a wasteful number, since it uses less digits than its factorization.

97855390658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48927695331.

The product of its (nonzero) digits is 81648000, while the sum is 65.

The spelling of 97855390658 in words is "ninety-seven billion, eight hundred fifty-five million, three hundred ninety thousand, six hundred fifty-eight".