971697546778 has 16 divisors (see below), whose sum is σ = 1665842592960. Its totient is φ = 416422963296.

The previous prime is 971697546773. The next prime is 971697546779. The reversal of 971697546778 is 877645796179.

It is a happy number.

It is a super-2 number, since 2×971697546778² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (971697546773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1247451 + ... + 1870702.

It is an arithmetic number, because the mean of its divisors is an integer number (104115162060).

Almost surely, 2^971697546778 is an apocalyptic number.

971697546778 is a deficient number, since it is larger than the sum of its proper divisors (694145046182).

971697546778 is a wasteful number, since it uses less digits than its factorization.

971697546778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140421.

The product of its digits is 1120210560, while the sum is 76.

The spelling of 971697546778 in words is "nine hundred seventy-one billion, six hundred ninety-seven million, five hundred forty-six thousand, seven hundred seventy-eight".