51026826621778 has 8 divisors (see below), whose sum is σ = 87474559923072. Its totient is φ = 21868639980756.

The previous prime is 51026826621737. The next prime is 51026826621919. The reversal of 51026826621778 is 87712662862015.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1822386665050 + ... + 1822386665077.

It is an arithmetic number, because the mean of its divisors is an integer number (10934319990384).

Almost surely, 2^{51026826621778} is an apocalyptic number.

51026826621778 is a deficient number, since it is larger than the sum of its proper divisors (36447733301294).

51026826621778 is a wasteful number, since it uses less digits than its factorization.

51026826621778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3644773330136.

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 51026826621778 in words is "fifty-one trillion, twenty-six billion, eight hundred twenty-six million, six hundred twenty-one thousand, seven hundred seventy-eight".