1618363078201 has 9 divisors (see below), whose sum is σ = 1653590050149. Its totient is φ = 1583871302364.

The previous prime is 1618363078187. The next prime is 1618363078219. The reversal of 1618363078201 is 1028703638161.

The square root of 1618363078201 is 1272149.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1618363078201 - 2⁹ = 1618363077689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1618363072201) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 59777470 + ... + 59804536.

Almost surely, 2^{1618363078201} is an apocalyptic number.

1618363078201 is the 1272149-th square number.

1618363078201 is the 636075-th centered octagonal number.

It is an amenable number.

1618363078201 is a deficient number, since it is larger than the sum of its proper divisors (35226971948).

1618363078201 is an frugal number, since it uses more digits than its factorization.

1618363078201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54228 (or 27114 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 1618363078201 in words is "one trillion, six hundred eighteen billion, three hundred sixty-three million, seventy-eight thousand, two hundred one".