1237938128640 has 1152 divisors, whose sum is σ = 4801303019520. Its totient is φ = 300838551552.

The previous prime is 1237938128621. The next prime is 1237938128671. The reversal of 1237938128640 is 468218397321.

It is a happy number.

1237938128640 is a `hidden beast` number, since 1 + 237 + 9 + 381 + 28 + 6 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

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 127 ways as a sum of consecutive naturals, for example, 3506906704 + ... + 3506907056.

It is an arithmetic number, because the mean of its divisors is an integer number (4167797760).

Almost surely, 2^{1237938128640} is an apocalyptic number.

1237938128640 is a gapful number since it is divisible by the number (10) 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 1237938128640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2400651509760).

1237938128640 is an abundant number, since it is smaller than the sum of its proper divisors (3563364890880).

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

1237938128640 is a wasteful number, since it uses less digits than its factorization.

1237938128640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 1237938128640 in words is "one trillion, two hundred thirty-seven billion, nine hundred thirty-eight million, one hundred twenty-eight thousand, six hundred forty".