261678037622020 has 24 divisors (see below), whose sum is σ = 549542610388800. Its totient is φ = 104667647166432.

The previous prime is 261678037622011. The next prime is 261678037622021. The reversal of 261678037622020 is 20226730876162.

It is a super-2 number, since 2×261678037622020² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261678037622021) 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, 222391200 + ... + 223564759.

It is an arithmetic number, because the mean of its divisors is an integer number (22897608766200).

Almost surely, 2^{261678037622020} is an apocalyptic number.

261678037622020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261678037622020 is an abundant number, since it is smaller than the sum of its proper divisors (287864572766780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261678037622020 is a wasteful number, since it uses less digits than its factorization.

261678037622020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445985307 (or 445985305 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 261678037622020 in words is "two hundred sixty-one trillion, six hundred seventy-eight billion, thirty-seven million, six hundred twenty-two thousand, twenty".