55720747960 has 64 divisors (see below), whose sum is σ = 125814124800. Its totient is φ = 22209792000.

The previous prime is 55720747949. The next prime is 55720747961. The reversal of 55720747960 is 6974702755.

It is a super-3 number, since 3×55720747960³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55720747898 and 55720747907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55720747961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16878310 + ... + 16881610.

It is an arithmetic number, because the mean of its divisors is an integer number (1965845700).

Almost surely, 2^55720747960 is an apocalyptic number.

It is an amenable number.

55720747960 is an abundant number, since it is smaller than the sum of its proper divisors (70093376840).

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

55720747960 is a wasteful number, since it uses less digits than its factorization.

55720747960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4672 (or 4668 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 52.

The spelling of 55720747960 in words is "fifty-five billion, seven hundred twenty million, seven hundred forty-seven thousand, nine hundred sixty".