997610702401 has 4 divisors (see below), whose sum is σ = 998226133204. Its totient is φ = 996995271600.

The previous prime is 997610702371. The next prime is 997610702411. The reversal of 997610702401 is 104207016799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104207016799 = 1051 ⋅99150349.

It can be written as a sum of positive squares in 2 ways, for example, as 663775196176 + 333835506225 = 814724^2 + 577785^2 .

It is a cyclic number.

It is not a de Polignac number, because 997610702401 - 2²¹ = 997608605249 is a prime.

It is a super-2 number, since 2×997610702401² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997610702411) 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 3 ways as a sum of consecutive naturals, for example, 307712970 + ... + 307716211.

It is an arithmetic number, because the mean of its divisors is an integer number (249556533301).

Almost surely, 2^997610702401 is an apocalyptic number.

It is an amenable number.

997610702401 is a deficient number, since it is larger than the sum of its proper divisors (615430803).

997610702401 is a wasteful number, since it uses less digits than its factorization.

997610702401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615430802.

The product of its (nonzero) digits is 190512, while the sum is 46.

The spelling of 997610702401 in words is "nine hundred ninety-seven billion, six hundred ten million, seven hundred two thousand, four hundred one".