76225121281 has 8 divisors (see below), whose sum is σ = 78326513064. Its totient is φ = 74125900800.

The previous prime is 76225121257. The next prime is 76225121299. The reversal of 76225121281 is 18212152267.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11016391681 + 65208729600 = 104959^2 + 255360^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76225121281 - 2¹⁷ = 76224990209 is a prime.

It is a super-2 number, since 2×76225121281² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76225121281.

It is not an unprimeable number, because it can be changed into a prime (76225121221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471520 + ... + 612193.

It is an arithmetic number, because the mean of its divisors is an integer number (9790814133).

Almost surely, 2^76225121281 is an apocalyptic number.

It is an amenable number.

76225121281 is a deficient number, since it is larger than the sum of its proper divisors (2101391783).

76225121281 is a wasteful number, since it uses less digits than its factorization.

76225121281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085651.

The product of its digits is 26880, while the sum is 37.

It can be divided in two parts, 76225 and 121281, that added together give a triangular number (197506 = T₆₂₈).

The spelling of 76225121281 in words is "seventy-six billion, two hundred twenty-five million, one hundred twenty-one thousand, two hundred eighty-one".