3551022640 has 80 divisors (see below), whose sum is σ = 9096087456. Its totient is φ = 1278464000.

The previous prime is 3551022623. The next prime is 3551022641. The reversal of 3551022640 is 462201553.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 3551022599 and 3551022608.

It is not an unprimeable number, because it can be changed into a prime (3551022641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68904 + ... + 108856.

Almost surely, 2^3551022640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3551022640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4548043728).

3551022640 is an abundant number, since it is smaller than the sum of its proper divisors (5545064816).

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

3551022640 is a wasteful number, since it uses less digits than its factorization.

3551022640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40078 (or 40072 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 3551022640 is about 59590.4576253615. The cubic root of 3551022640 is about 1525.6367692833.

The spelling of 3551022640 in words is "three billion, five hundred fifty-one million, twenty-two thousand, six hundred forty".