97451715778 has 8 divisors (see below), whose sum is σ = 146414492172. Its totient is φ = 48646885056.

The previous prime is 97451715743. The next prime is 97451715827. The reversal of 97451715778 is 87751715479.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 93179394009 + 4272321769 = 305253^2 + 65363^2 .

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, 39484875 + ... + 39487342.

Almost surely, 2^97451715778 is an apocalyptic number.

97451715778 is a deficient number, since it is larger than the sum of its proper divisors (48962776394).

97451715778 is a wasteful number, since it uses less digits than its factorization.

97451715778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78972836.

The product of its digits is 17287200, while the sum is 61.

The spelling of 97451715778 in words is "ninety-seven billion, four hundred fifty-one million, seven hundred fifteen thousand, seven hundred seventy-eight".