997000557615 has 12 divisors (see below), whose sum is σ = 1728134299944. Its totient is φ = 531733630704.

The previous prime is 997000557601. The next prime is 997000557649. The reversal of 997000557615 is 516755000799.

997000557615 is a `hidden beast` number, since 9 + 9 + 70 + 0 + 0 + 557 + 6 + 15 = 666.

997000557615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 997000557615 - 2⁶ = 997000557551 is a prime.

It is a super-2 number, since 2×997000557615² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11077783929 + ... + 11077784018.

It is an arithmetic number, because the mean of its divisors is an integer number (144011191662).

Almost surely, 2^997000557615 is an apocalyptic number.

997000557615 is a deficient number, since it is larger than the sum of its proper divisors (731133742329).

997000557615 is a wasteful number, since it uses less digits than its factorization.

997000557615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22155567958 (or 22155567955 counting only the distinct ones).

The product of its (nonzero) digits is 2976750, while the sum is 54.

The spelling of 997000557615 in words is "nine hundred ninety-seven billion, five hundred fifty-seven thousand, six hundred fifteen".