1861877095400 has 48 divisors (see below), whose sum is σ = 4947273428640. Its totient is φ = 638357860800.

The previous prime is 1861877095399. The next prime is 1861877095409. The reversal of 1861877095400 is 45907781681.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (1861877095409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 664954706 + ... + 664957505.

It is an arithmetic number, because the mean of its divisors is an integer number (103068196430).

Almost surely, 2^{1861877095400} is an apocalyptic number.

1861877095400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1861877095400 is an abundant number, since it is smaller than the sum of its proper divisors (3085396333240).

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

1861877095400 is a wasteful number, since it uses less digits than its factorization.

1861877095400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329912234 (or 1329912225 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 56.

The spelling of 1861877095400 in words is "one trillion, eight hundred sixty-one billion, eight hundred seventy-seven million, ninety-five thousand, four hundred".