7753747981 has 16 divisors (see below), whose sum is σ = 9340764160. Its totient is φ = 6287537520.

The previous prime is 7753747921. The next prime is 7753747997. The reversal of 7753747981 is 1897473577.

It is a happy number.

It is a 10-Lehmer number, since φ(7753747981) divides (7753747981-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 7753747981 - 2²⁵ = 7720193549 is a prime.

It is a super-2 number, since 2×7753747981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7753747921) 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, 56596 + ... + 136786.

It is an arithmetic number, because the mean of its divisors is an integer number (583797760).

Almost surely, 2^7753747981 is an apocalyptic number.

It is an amenable number.

7753747981 is a deficient number, since it is larger than the sum of its proper divisors (1587016179).

7753747981 is a wasteful number, since it uses less digits than its factorization.

7753747981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80944.

The product of its digits is 10372320, while the sum is 58.

The square root of 7753747981 is about 88055.3688368858. The cubic root of 7753747981 is about 1979.2647663861.

The spelling of 7753747981 in words is "seven billion, seven hundred fifty-three million, seven hundred forty-seven thousand, nine hundred eighty-one".