3551636401 has 8 divisors (see below), whose sum is σ = 3650343080. Its totient is φ = 3455596944.

The previous prime is 3551636383. The next prime is 3551636437. The reversal of 3551636401 is 1046361553.

It can be written as a sum of positive squares in 4 ways, for example, as 1233695376 + 2317941025 = 35124^2 + 48145^2 .

It is not a de Polignac number, because 3551636401 - 2⁹ = 3551635889 is a prime.

It is a super-2 number, since 2×3551636401² = 25228242249816465602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3551636461) 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, 15595 + ... + 85711.

It is an arithmetic number, because the mean of its divisors is an integer number (456292885).

Almost surely, 2^3551636401 is an apocalyptic number.

It is an amenable number.

3551636401 is a deficient number, since it is larger than the sum of its proper divisors (98706679).

3551636401 is an frugal number, since it uses more digits than its factorization.

3551636401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70228 (or 70154 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 3551636401 is about 59595.6072290567. The cubic root of 3551636401 is about 1525.7246615612.

Adding to 3551636401 its reverse (1046361553), we get a palindrome (4597997954).

It can be divided in two parts, 35516 and 36401, that added together give a palindrome (71917).

The spelling of 3551636401 in words is "three billion, five hundred fifty-one million, six hundred thirty-six thousand, four hundred one".