3581635778974 has 36 divisors (see below), whose sum is σ = 6162252305832. Its totient is φ = 1557171559240.

The previous prime is 3581635778969. The next prime is 3581635778977. The reversal of 3581635778974 is 4798775361853.

It is a super-2 number, since 2×3581635778974² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3581635778897 and 3581635778906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3581635778977) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 141180039 + ... + 141205405.

It is an arithmetic number, because the mean of its divisors is an integer number (171173675162).

Almost surely, 2^{3581635778974} is an apocalyptic number.

3581635778974 is a deficient number, since it is larger than the sum of its proper divisors (2580616526858).

3581635778974 is an frugal number, since it uses more digits than its factorization.

3581635778974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50781 (or 25403 counting only the distinct ones).

The product of its digits is 1066867200, while the sum is 73.

The spelling of 3581635778974 in words is "three trillion, five hundred eighty-one billion, six hundred thirty-five million, seven hundred seventy-eight thousand, nine hundred seventy-four".