78244098261 has 16 divisors (see below), whose sum is σ = 119241058944. Its totient is φ = 44706429504.

The previous prime is 78244098253. The next prime is 78244098277. The reversal of 78244098261 is 16289044287.

It is not a de Polignac number, because 78244098261 - 2³ = 78244098253 is a prime.

It is a super-2 number, since 2×78244098261² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78244098211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33615 + ... + 397011.

It is an arithmetic number, because the mean of its divisors is an integer number (7452566184).

Almost surely, 2^78244098261 is an apocalyptic number.

It is an amenable number.

78244098261 is a deficient number, since it is larger than the sum of its proper divisors (40996960683).

78244098261 is a wasteful number, since it uses less digits than its factorization.

78244098261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373660.

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 78244098261 in words is "seventy-eight billion, two hundred forty-four million, ninety-eight thousand, two hundred sixty-one".