1997615012 has 12 divisors (see below), whose sum is σ = 3498611760. Its totient is φ = 998011656.

The previous prime is 1997615003. The next prime is 1997615023. The reversal of 1997615012 is 2105167991.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193298 + ... + 203369.

It is an arithmetic number, because the mean of its divisors is an integer number (291550980).

Almost surely, 2^1997615012 is an apocalyptic number.

It is an amenable number.

1997615012 is a deficient number, since it is larger than the sum of its proper divisors (1500996748).

1997615012 is a wasteful number, since it uses less digits than its factorization.

1997615012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397930 (or 397928 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 41.

The square root of 1997615012 is about 44694.6866193287. The cubic root of 1997615012 is about 1259.4200345920.

The spelling of 1997615012 in words is "one billion, nine hundred ninety-seven million, six hundred fifteen thousand, twelve".