1953563878 has 16 divisors (see below), whose sum is σ = 3350276640. Its totient is φ = 836914176.

The previous prime is 1953563839. The next prime is 1953563897. The reversal of 1953563878 is 8783653591.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11700 + ... + 63592.

It is an arithmetic number, because the mean of its divisors is an integer number (209392290).

Almost surely, 2^1953563878 is an apocalyptic number.

1953563878 is a deficient number, since it is larger than the sum of its proper divisors (1396712762).

1953563878 is a wasteful number, since it uses less digits than its factorization.

1953563878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54591.

The product of its digits is 5443200, while the sum is 55.

The square root of 1953563878 is about 44199.1388830145. The cubic root of 1953563878 is about 1250.0936202947.

The spelling of 1953563878 in words is "one billion, nine hundred fifty-three million, five hundred sixty-three thousand, eight hundred seventy-eight".