2061249226778 has 16 divisors (see below), whose sum is σ = 3559362588864. Its totient is φ = 876944404320.

The previous prime is 2061249226759. The next prime is 2061249226837. The reversal of 2061249226778 is 8776229421602.

It is a super-2 number, since 2×2061249226778² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537341468 + ... + 537345303.

It is an arithmetic number, because the mean of its divisors is an integer number (222460161804).

Almost surely, 2^{2061249226778} is an apocalyptic number.

2061249226778 is a deficient number, since it is larger than the sum of its proper divisors (1498113362086).

2061249226778 is a wasteful number, since it uses less digits than its factorization.

2061249226778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074686917.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 2061249226778 in words is "two trillion, sixty-one billion, two hundred forty-nine million, two hundred twenty-six thousand, seven hundred seventy-eight".