131445104644 has 18 divisors (see below), whose sum is σ = 267584677710. Its totient is φ = 56333616192.

The previous prime is 131445104633. The next prime is 131445104647. The reversal of 131445104644 is 446401544131.

It can be written as a sum of positive squares in only one way, i.e., 118775351044 + 12669753600 = 344638^2 + 112560^2 .

It is a super-2 number, since 2×131445104644² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131445104647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 335318949 + ... + 335319340.

Almost surely, 2^131445104644 is an apocalyptic number.

131445104644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

131445104644 is an abundant number, since it is smaller than the sum of its proper divisors (136139573066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131445104644 is a wasteful number, since it uses less digits than its factorization.

131445104644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670638307 (or 670638298 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

Adding to 131445104644 its reverse (446401544131), we get a palindrome (577846648775).

The spelling of 131445104644 in words is "one hundred thirty-one billion, four hundred forty-five million, one hundred four thousand, six hundred forty-four".