3521779453864 has 32 divisors (see below), whose sum is σ = 7563040531200. Its totient is φ = 1506059997120.

The previous prime is 3521779453847. The next prime is 3521779453903. The reversal of 3521779453864 is 4683549771253.

It is a super-2 number, since 2×3521779453864² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3521779453796 and 3521779453805.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68183424 + ... + 68235055.

It is an arithmetic number, because the mean of its divisors is an integer number (236345016600).

Almost surely, 2^{3521779453864} is an apocalyptic number.

It is an amenable number.

3521779453864 is an abundant number, since it is smaller than the sum of its proper divisors (4041261077336).

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

3521779453864 is a wasteful number, since it uses less digits than its factorization.

3521779453864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136418953 (or 136418949 counting only the distinct ones).

The product of its digits is 152409600, while the sum is 64.

The spelling of 3521779453864 in words is "three trillion, five hundred twenty-one billion, seven hundred seventy-nine million, four hundred fifty-three thousand, eight hundred sixty-four".