97857504621 has 10 divisors (see below), whose sum is σ = 146182198382. Its totient is φ = 65238336360.

The previous prime is 97857504587. The next prime is 97857504629. The reversal of 97857504621 is 12640575879.

97857504621 is a `hidden beast` number, since 9 + 7 + 8 + 5 + 7 + 5 + 0 + 4 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 59905010025 + 37952494596 = 244755^2 + 194814^2 .

It is not a de Polignac number, because 97857504621 - 2¹¹ = 97857502573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97857504629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 604058590 + ... + 604058751.

Almost surely, 2^97857504621 is an apocalyptic number.

It is an amenable number.

97857504621 is a deficient number, since it is larger than the sum of its proper divisors (48324693761).

97857504621 is a wasteful number, since it uses less digits than its factorization.

97857504621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208117353 (or 1208117344 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 54.

The spelling of 97857504621 in words is "ninety-seven billion, eight hundred fifty-seven million, five hundred four thousand, six hundred twenty-one".