1953000378618 has 32 divisors (see below), whose sum is σ = 4040772480000. Its totient is φ = 628539084096.

The previous prime is 1953000378611. The next prime is 1953000378649. The reversal of 1953000378618 is 8168730003591.

It is not an unprimeable number, because it can be changed into a prime (1953000378611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12449880 + ... + 12605772.

It is an arithmetic number, because the mean of its divisors is an integer number (126274140000).

Almost surely, 2^{1953000378618} is an apocalyptic number.

1953000378618 is an abundant number, since it is smaller than the sum of its proper divisors (2087772101382).

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

1953000378618 is a wasteful number, since it uses less digits than its factorization.

1953000378618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227926.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 1953000378618 in words is "one trillion, nine hundred fifty-three billion, three hundred seventy-eight thousand, six hundred eighteen".