97681256146 has 4 divisors (see below), whose sum is σ = 146521884222. Its totient is φ = 48840628072.

The previous prime is 97681256107. The next prime is 97681256159. The reversal of 97681256146 is 64165218679.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64165218679 = 109 ⋅588671731.

It can be written as a sum of positive squares in only one way, i.e., 69318991225 + 28362264921 = 263285^2 + 168411^2 .

It is a super-3 number, since 3×97681256146³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24420314035 + ... + 24420314038.

Almost surely, 2^97681256146 is an apocalyptic number.

97681256146 is a deficient number, since it is larger than the sum of its proper divisors (48840628076).

97681256146 is a wasteful number, since it uses less digits than its factorization.

97681256146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48840628075.

The product of its digits is 4354560, while the sum is 55.

The spelling of 97681256146 in words is "ninety-seven billion, six hundred eighty-one million, two hundred fifty-six thousand, one hundred forty-six".