551219767978 has 32 divisors (see below), whose sum is σ = 985862803968. Its totient is φ = 228208972800.

The previous prime is 551219767939. The next prime is 551219767997. The reversal of 551219767978 is 879767912155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23760175 + ... + 23783362.

It is an arithmetic number, because the mean of its divisors is an integer number (30808212624).

Almost surely, 2^551219767978 is an apocalyptic number.

551219767978 is a deficient number, since it is larger than the sum of its proper divisors (434643035990).

551219767978 is a wasteful number, since it uses less digits than its factorization.

551219767978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47543598.

The product of its digits is 66679200, while the sum is 67.

The spelling of 551219767978 in words is "five hundred fifty-one billion, two hundred nineteen million, seven hundred sixty-seven thousand, nine hundred seventy-eight".