1023155978652 has 240 divisors, whose sum is σ = 2767980821760. Its totient is φ = 329416927488.

The previous prime is 1023155978633. The next prime is 1023155978683. The reversal of 1023155978652 is 2568795513201.

1023155978652 is a `hidden beast` number, since 1 + 0 + 2 + 3 + 1 + 559 + 7 + 86 + 5 + 2 = 666.

1023155978652 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 283656633 + ... + 283660239.

It is an arithmetic number, because the mean of its divisors is an integer number (11533253424).

Almost surely, 2^{1023155978652} is an apocalyptic number.

1023155978652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1023155978652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1383990410880).

1023155978652 is an abundant number, since it is smaller than the sum of its proper divisors (1744824843108).

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

1023155978652 is a wasteful number, since it uses less digits than its factorization.

1023155978652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942 (or 3931 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 54.

The spelling of 1023155978652 in words is "one trillion, twenty-three billion, one hundred fifty-five million, nine hundred seventy-eight thousand, six hundred fifty-two".