7842911261 has 4 divisors (see below), whose sum is σ = 7844966592. Its totient is φ = 7840855932.

The previous prime is 7842911249. The next prime is 7842911267. The reversal of 7842911261 is 1621192487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7842911261 - 2¹⁴ = 7842894877 is a prime.

It is a super-2 number, since 2×7842911261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7842911267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021931 + ... + 1029576.

It is an arithmetic number, because the mean of its divisors is an integer number (1961241648).

Almost surely, 2^7842911261 is an apocalyptic number.

It is an amenable number.

7842911261 is a deficient number, since it is larger than the sum of its proper divisors (2055331).

7842911261 is a wasteful number, since it uses less digits than its factorization.

7842911261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055330.

The product of its digits is 48384, while the sum is 41.

The square root of 7842911261 is about 88560.2126296002. The cubic root of 7842911261 is about 1986.8226410348.

The spelling of 7842911261 in words is "seven billion, eight hundred forty-two million, nine hundred eleven thousand, two hundred sixty-one".