1954607108778 has 12 divisors (see below), whose sum is σ = 4234982069058. Its totient is φ = 651535702920.

The previous prime is 1954607108749. The next prime is 1954607108791. The reversal of 1954607108778 is 8778017064591.

1954607108778 is a `hidden beast` number, since 1 + 9 + 5 + 4 + 607 + 10 + 8 + 7 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1886878607769 + 67728501009 = 1373637^2 + 260247^2 .

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54294641893 + ... + 54294641928.

Almost surely, 2^{1954607108778} is an apocalyptic number.

1954607108778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1954607108778 is an abundant number, since it is smaller than the sum of its proper divisors (2280374960280).

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

1954607108778 is a wasteful number, since it uses less digits than its factorization.

1954607108778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108589283829 (or 108589283826 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 63.

The spelling of 1954607108778 in words is "one trillion, nine hundred fifty-four billion, six hundred seven million, one hundred eight thousand, seven hundred seventy-eight".