2621647480 has 32 divisors (see below), whose sum is σ = 5900202000. Its totient is φ = 1048393216.

The previous prime is 2621647471. The next prime is 2621647487. The reversal of 2621647480 is 847461262.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2621647487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252879 + ... + 263041.

Almost surely, 2^2621647480 is an apocalyptic number.

2621647480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2621647480 is an abundant number, since it is smaller than the sum of its proper divisors (3278554520).

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

2621647480 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 2621647480 = (6681074224)₉.

2621647480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16623 (or 16619 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 2621647480 is about 51202.0261317851. The cubic root of 2621647480 is about 1378.8745777855.

The spelling of 2621647480 in words is "two billion, six hundred twenty-one million, six hundred forty-seven thousand, four hundred eighty".