1925652223278 has 96 divisors (see below), whose sum is σ = 4945774788864. Its totient is φ = 550087319232.

The previous prime is 1925652223219. The next prime is 1925652223279. The reversal of 1925652223278 is 8723222565291.

It is a happy number.

1925652223278 is a `hidden beast` number, since 1 + 9 + 2 + 565 + 2 + 2 + 2 + 3 + 2 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1925652223279) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20013601 + ... + 20109587.

It is an arithmetic number, because the mean of its divisors is an integer number (51518487384).

Almost surely, 2^{1925652223278} is an apocalyptic number.

1925652223278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1925652223278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2472887394432).

1925652223278 is an abundant number, since it is smaller than the sum of its proper divisors (3020122565586).

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

1925652223278 is an equidigital number, since it uses as much as digits as its factorization.

1925652223278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101908 (or 101896 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 1925652223278 in words is "one trillion, nine hundred twenty-five billion, six hundred fifty-two million, two hundred twenty-three thousand, two hundred seventy-eight".