49265797681 has 9 divisors (see below), whose sum is σ = 49590869419. Its totient is φ = 48942847336.

The previous prime is 49265797663. The next prime is 49265797697. The reversal of 49265797681 is 18679756294.

The square root of 49265797681 is 221959.

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

49265797681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 44814773025 + 4451024656 = 211695^2 + 66716^2 .

It is not a de Polignac number, because 49265797681 - 2¹¹ = 49265795633 is a prime.

It is a super-2 number, since 2×49265797681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49265797631) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 38398266 + ... + 38399548.

Almost surely, 2^49265797681 is an apocalyptic number.

49265797681 is the 221959-th square number.

49265797681 is the 110980-th centered octagonal number.

It is an amenable number.

49265797681 is a deficient number, since it is larger than the sum of its proper divisors (325071738).

49265797681 is an frugal number, since it uses more digits than its factorization.

49265797681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2912 (or 1456 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 64.

Multiplying 49265797681 by its sum of digits (64), we get a square (3153011051584 = 1775672²).

The spelling of 49265797681 in words is "forty-nine billion, two hundred sixty-five million, seven hundred ninety-seven thousand, six hundred eighty-one".