363671561 has 16 divisors (see below), whose sum is σ = 414903168. Its totient is φ = 315532800.

The previous prime is 363671549. The next prime is 363671573. The reversal of 363671561 is 165176363.

It is an interprime number because it is at equal distance from previous prime (363671549) and next prime (363671573).

It is a de Polignac number, because none of the positive numbers 2^k-363671561 is a prime.

It is a super-3 number, since 3×363671561³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (363671521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135545 + ... + 138201.

It is an arithmetic number, because the mean of its divisors is an integer number (25931448).

Almost surely, 2^363671561 is an apocalyptic number.

It is an amenable number.

363671561 is a deficient number, since it is larger than the sum of its proper divisors (51231607).

363671561 is a wasteful number, since it uses less digits than its factorization.

363671561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232.

The product of its digits is 68040, while the sum is 38.

The square root of 363671561 is about 19070.1746452412. The cubic root of 363671561 is about 713.7888838806.

The spelling of 363671561 in words is "three hundred sixty-three million, six hundred seventy-one thousand, five hundred sixty-one".