56781694554 has 16 divisors (see below), whose sum is σ = 122299034592. Its totient is φ = 17471290608.

The previous prime is 56781694553. The next prime is 56781694561. The reversal of 56781694554 is 45549618765.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56781694553) 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, 363985144 + ... + 363985299.

It is an arithmetic number, because the mean of its divisors is an integer number (7643689662).

Almost surely, 2^56781694554 is an apocalyptic number.

56781694554 is an abundant number, since it is smaller than the sum of its proper divisors (65517340038).

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

56781694554 is a wasteful number, since it uses less digits than its factorization.

56781694554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727970461.

The product of its digits is 36288000, while the sum is 60.

The spelling of 56781694554 in words is "fifty-six billion, seven hundred eighty-one million, six hundred ninety-four thousand, five hundred fifty-four".