2455621956 has 72 divisors (see below), whose sum is σ = 6495600384. Its totient is φ = 780721920.

The previous prime is 2455621943. The next prime is 2455621963. The reversal of 2455621956 is 6591265542.

2455621956 is a `hidden beast` number, since 2 + 4 + 556 + 2 + 1 + 95 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 299836 + ... + 307916.

It is an arithmetic number, because the mean of its divisors is an integer number (90216672).

Almost surely, 2^2455621956 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 2455621956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3247800192).

2455621956 is an abundant number, since it is smaller than the sum of its proper divisors (4039978428).

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

2455621956 is a wasteful number, since it uses less digits than its factorization.

2455621956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8481 (or 8476 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 2455621956 is about 49554.2324731198. The cubic root of 2455621956 is about 1349.1301128502.

The spelling of 2455621956 in words is "two billion, four hundred fifty-five million, six hundred twenty-one thousand, nine hundred fifty-six".