103661531553 has 8 divisors (see below), whose sum is σ = 144224739648. Its totient is φ = 66103005584.

The previous prime is 103661531537. The next prime is 103661531569. The reversal of 103661531553 is 355135166301.

It is an interprime number because it is at equal distance from previous prime (103661531537) and next prime (103661531569).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 103661531553 - 2⁴ = 103661531537 is a prime.

It is a super-2 number, since 2×103661531553² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (103661531503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 751170450 + ... + 751170587.

It is an arithmetic number, because the mean of its divisors is an integer number (18028092456).

Almost surely, 2^103661531553 is an apocalyptic number.

It is an amenable number.

103661531553 is a deficient number, since it is larger than the sum of its proper divisors (40563208095).

103661531553 is a wasteful number, since it uses less digits than its factorization.

103661531553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502341063.

The product of its (nonzero) digits is 121500, while the sum is 39.

Adding to 103661531553 its reverse (355135166301), we get a palindrome (458796697854).

The spelling of 103661531553 in words is "one hundred three billion, six hundred sixty-one million, five hundred thirty-one thousand, five hundred fifty-three".