42905565454756 has 9 divisors (see below), whose sum is σ = 75084762471649. Its totient is φ = 21452776177144.

The previous prime is 42905565454751. The next prime is 42905565454781. The reversal of 42905565454756 is 65745456550924.

It is a happy number.

The square root of 42905565454756 is 6550234.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 31070479328100 + 11835086126656 = 5574090^2 + 3440216^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42905565454691 and 42905565454700.

It is not an unprimeable number, because it can be changed into a prime (42905565454751) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11462910 + ... + 14738026.

Almost surely, 2^{42905565454756} is an apocalyptic number.

42905565454756 is the 6550234-th square number.

It is an amenable number.

42905565454756 is a deficient number, since it is larger than the sum of its proper divisors (32179197016893).

42905565454756 is an frugal number, since it uses more digits than its factorization.

42905565454756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6550238 (or 3275119 counting only the distinct ones).

The product of its (nonzero) digits is 907200000, while the sum is 67.

The spelling of 42905565454756 in words is "forty-two trillion, nine hundred five billion, five hundred sixty-five million, four hundred fifty-four thousand, seven hundred fifty-six".