200721156616 has 8 divisors (see below), whose sum is σ = 376352168670. Its totient is φ = 100360578304.

The previous prime is 200721156599. The next prime is 200721156631. The reversal of 200721156616 is 616651127002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 137755291716 + 62965864900 = 371154^2 + 250930^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12545072281 + ... + 12545072296.

Almost surely, 2^200721156616 is an apocalyptic number.

It is an amenable number.

200721156616 is a deficient number, since it is larger than the sum of its proper divisors (175631012054).

200721156616 is a wasteful number, since it uses less digits than its factorization.

200721156616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25090144583 (or 25090144579 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 200721156616 in words is "two hundred billion, seven hundred twenty-one million, one hundred fifty-six thousand, six hundred sixteen".