3551261205408 has 96 divisors (see below), whose sum is σ = 10670405477760. Its totient is φ = 1013063024640.

The previous prime is 3551261205391. The next prime is 3551261205421. The reversal of 3551261205408 is 8045021621553.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×3551261205408² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 3551261205408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3691413 + ... + 4552916.

It is an arithmetic number, because the mean of its divisors is an integer number (111150057060).

Almost surely, 2^{3551261205408} is an apocalyptic number.

It is an amenable number.

3551261205408 is an abundant number, since it is smaller than the sum of its proper divisors (7119144272352).

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

3551261205408 is a wasteful number, since it uses less digits than its factorization.

3551261205408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8244990 (or 8244982 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 3551261205408 in words is "three trillion, five hundred fifty-one billion, two hundred sixty-one million, two hundred five thousand, four hundred eight".