1023426653550 has 96 divisors (see below), whose sum is σ = 2968141431552. Its totient is φ = 228485940480.

The previous prime is 1023426653537. The next prime is 1023426653551. The reversal of 1023426653550 is 553566243201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023426653551) 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, 11288479 + ... + 11378778.

It is an arithmetic number, because the mean of its divisors is an integer number (30918139912).

Almost surely, 2^{1023426653550} is an apocalyptic number.

1023426653550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1023426653550 is an abundant number, since it is smaller than the sum of its proper divisors (1944714778002).

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

1023426653550 is a wasteful number, since it uses less digits than its factorization.

1023426653550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22667322 (or 22667317 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 1023426653550 in words is "one trillion, twenty-three billion, four hundred twenty-six million, six hundred fifty-three thousand, five hundred fifty".