1621652056 has 8 divisors (see below), whose sum is σ = 3040597620. Its totient is φ = 810826024.

The previous prime is 1621652029. The next prime is 1621652057. The reversal of 1621652056 is 6502561261.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621652057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101353246 + ... + 101353261.

Almost surely, 2^1621652056 is an apocalyptic number.

It is an amenable number.

1621652056 is a deficient number, since it is larger than the sum of its proper divisors (1418945564).

1621652056 is a wasteful number, since it uses less digits than its factorization.

1621652056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202706513 (or 202706509 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1621652056 is about 40269.7411960892. The cubic root of 1621652056 is about 1174.8593900853.

The spelling of 1621652056 in words is "one billion, six hundred twenty-one million, six hundred fifty-two thousand, fifty-six".