56819961 has 48 divisors (see below), whose sum is σ = 96183360. Its totient is φ = 33203520.

The previous prime is 56819911. The next prime is 56820047. The reversal of 56819961 is 16991865.

It is not a de Polignac number, because 56819961 - 2⁶ = 56819897 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56819911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77151 + ... + 77883.

It is an arithmetic number, because the mean of its divisors is an integer number (2003820).

Almost surely, 2^56819961 is an apocalyptic number.

It is an amenable number.

56819961 is a deficient number, since it is larger than the sum of its proper divisors (39363399).

56819961 is a wasteful number, since it uses less digits than its factorization.

56819961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 776 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 56819961 is about 7537.9016310907. The cubic root of 56819961 is about 384.4444926109. Note that the first 4 decimals are identical.

The spelling of 56819961 in words is "fifty-six million, eight hundred nineteen thousand, nine hundred sixty-one".