97220631806978 has 8 divisors (see below), whose sum is σ = 153506260747920. Its totient is φ = 46051878224340.

The previous prime is 97220631806951. The next prime is 97220631807023. The reversal of 97220631806978 is 87960813602279.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1279218839528 + ... + 1279218839603.

It is an arithmetic number, because the mean of its divisors is an integer number (19188282593490).

Almost surely, 2^{97220631806978} is an apocalyptic number.

97220631806978 is a deficient number, since it is larger than the sum of its proper divisors (56285628940942).

97220631806978 is a wasteful number, since it uses less digits than its factorization.

97220631806978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558437679152.

The product of its (nonzero) digits is 109734912, while the sum is 68.

The spelling of 97220631806978 in words is "ninety-seven trillion, two hundred twenty billion, six hundred thirty-one million, eight hundred six thousand, nine hundred seventy-eight".