7611302981881 has 9 divisors (see below), whose sum is σ = 7726787712399. Its totient is φ = 7497519360144.

The previous prime is 7611302981861. The next prime is 7611302981903. The reversal of 7611302981881 is 1881892031167.

The square root of 7611302981881 is 2758859.

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., 1937455205625 + 5673847776256 = 1391925^2 + 2381984^2 .

It is not a de Polignac number, because 7611302981881 - 2⁹ = 7611302981369 is a prime.

It is a super-2 number, since 2×7611302981881² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7611302981861) 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, 184822965 + ... + 184864141.

Almost surely, 2^{7611302981881} is an apocalyptic number.

7611302981881 is the 2758859-th square number.

7611302981881 is the 1379430-th centered octagonal number.

It is an amenable number.

7611302981881 is a deficient number, since it is larger than the sum of its proper divisors (115484730518).

7611302981881 is an frugal number, since it uses more digits than its factorization.

7611302981881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82488 (or 41244 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 55.

The spelling of 7611302981881 in words is "seven trillion, six hundred eleven billion, three hundred two million, nine hundred eighty-one thousand, eight hundred eighty-one".