997614828981 has 12 divisors (see below), whose sum is σ = 1441398081708. Its totient is φ = 664892452224.

The previous prime is 997614828967. The next prime is 997614828983. The reversal of 997614828981 is 189828416799.

997614828981 is a `hidden beast` number, since 9 + 9 + 7 + 61 + 482 + 8 + 9 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 314983602756 + 682631226225 = 561234^2 + 826215^2 .

It is not a de Polignac number, because 997614828981 - 2²³ = 997606440373 is a prime.

It is a super-2 number, since 2×997614828981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997614828983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15307380 + ... + 15372413.

It is an arithmetic number, because the mean of its divisors is an integer number (120116506809).

Almost surely, 2^997614828981 is an apocalyptic number.

It is an amenable number.

997614828981 is a deficient number, since it is larger than the sum of its proper divisors (443783252727).

997614828981 is a wasteful number, since it uses less digits than its factorization.

997614828981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30683412 (or 30683409 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 72.

The spelling of 997614828981 in words is "nine hundred ninety-seven billion, six hundred fourteen million, eight hundred twenty-eight thousand, nine hundred eighty-one".