986363154403561 has 9 divisors (see below), whose sum is σ = 1084184673415543. Its totient is φ = 896693462666320.

The previous prime is 986363154403547. The next prime is 986363154403577. The reversal of 986363154403561 is 165304451363689.

The square root of 986363154403561 is 31406419.

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

It can be written as a sum of positive squares in only one way, i.e., 819898453909161 + 166464700494400 = 28633869^2 + 12902120^2 .

It is not a de Polignac number, because 986363154403561 - 2¹⁵ = 986363154370793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 986363154403493 and 986363154403502.

It is not an unprimeable number, because it can be changed into a prime (986363154403541) 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, 344043045 + ... + 346898173.

Almost surely, 2^{986363154403561} is an apocalyptic number.

986363154403561 is the 31406419-th square number.

986363154403561 is the 15703210-th centered octagonal number.

It is an amenable number.

986363154403561 is a deficient number, since it is larger than the sum of its proper divisors (97821519011982).

986363154403561 is an frugal number, since it uses more digits than its factorization.

986363154403561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5710280 (or 2855140 counting only the distinct ones).

The product of its (nonzero) digits is 167961600, while the sum is 64.

The spelling of 986363154403561 in words is "nine hundred eighty-six trillion, three hundred sixty-three billion, one hundred fifty-four million, four hundred three thousand, five hundred sixty-one".