2621373678 has 144 divisors (see below), whose sum is σ = 7475255424. Its totient is φ = 680808240.

The previous prime is 2621373659. The next prime is 2621373683. The reversal of 2621373678 is 8763731262.

It is a super-2 number, since 2×2621373678² = 13743199919422495368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 256951 + ... + 266957.

It is an arithmetic number, because the mean of its divisors is an integer number (51911496).

Almost surely, 2^2621373678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2621373678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3737627712).

2621373678 is an abundant number, since it is smaller than the sum of its proper divisors (4853881746).

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

2621373678 is a wasteful number, since it uses less digits than its factorization.

2621373678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10049 (or 10030 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 2621373678 is about 51199.3523201222. The cubic root of 2621373678 is about 1378.8265733959.

The spelling of 2621373678 in words is "two billion, six hundred twenty-one million, three hundred seventy-three thousand, six hundred seventy-eight".