1995667774078 has 32 divisors (see below), whose sum is σ = 3392404727040. Its totient is φ = 872532024000.

The previous prime is 1995667774003. The next prime is 1995667774099. The reversal of 1995667774078 is 8704777665991.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1995667773995 and 1995667774013.

It is a congruent number.

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, 15516888 + ... + 15644971.

It is an arithmetic number, because the mean of its divisors is an integer number (106012647720).

Almost surely, 2^{1995667774078} is an apocalyptic number.

1995667774078 is a deficient number, since it is larger than the sum of its proper divisors (1396736952962).

1995667774078 is a wasteful number, since it uses less digits than its factorization.

1995667774078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31161984.

The product of its (nonzero) digits is 1120210560, while the sum is 76.

The spelling of 1995667774078 in words is "one trillion, nine hundred ninety-five billion, six hundred sixty-seven million, seven hundred seventy-four thousand, seventy-eight".