2621478068 has 18 divisors (see below), whose sum is σ = 5042554818. Its totient is φ = 1191580720.

The previous prime is 2621478053. The next prime is 2621478071. The reversal of 2621478068 is 8608741262.

It can be written as a sum of positive squares in only one way, i.e., 1569902884 + 1051575184 = 39622^2 + 32428^2 .

It is a super-2 number, since 2×2621478068² = 13744294522010025248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2707655 + ... + 2708622.

Almost surely, 2^2621478068 is an apocalyptic number.

It is an amenable number.

2621478068 is a deficient number, since it is larger than the sum of its proper divisors (2421076750).

2621478068 is a wasteful number, since it uses less digits than its factorization.

2621478068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5416303 (or 5416290 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 2621478068 is about 51200.3717564629. The cubic root of 2621478068 is about 1378.8448759875.

The spelling of 2621478068 in words is "two billion, six hundred twenty-one million, four hundred seventy-eight thousand, sixty-eight".