1051638061878 has 48 divisors (see below), whose sum is σ = 2292624131616. Its totient is φ = 348383151360.

The previous prime is 1051638061867. The next prime is 1051638061883. The reversal of 1051638061878 is 8781608361501.

1051638061878 is a `hidden beast` number, since 1 + 0 + 5 + 16 + 3 + 8 + 0 + 618 + 7 + 8 = 666.

It is a super-2 number, since 2×1051638061878² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4955751 + ... + 5163597.

It is an arithmetic number, because the mean of its divisors is an integer number (47763002742).

Almost surely, 2^{1051638061878} is an apocalyptic number.

1051638061878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1051638061878 is an abundant number, since it is smaller than the sum of its proper divisors (1240986069738).

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

1051638061878 is a wasteful number, since it uses less digits than its factorization.

1051638061878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209589 (or 209586 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 1051638061878 in words is "one trillion, fifty-one billion, six hundred thirty-eight million, sixty-one thousand, eight hundred seventy-eight".