1257023706040 has 64 divisors (see below), whose sum is σ = 2878275202560. Its totient is φ = 493975655040.

The previous prime is 1257023706023. The next prime is 1257023706077. The reversal of 1257023706040 is 406073207521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21717 + ... + 1585723.

It is an arithmetic number, because the mean of its divisors is an integer number (44973050040).

Almost surely, 2^{1257023706040} is an apocalyptic number.

1257023706040 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 1257023706040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439137601280).

1257023706040 is an abundant number, since it is smaller than the sum of its proper divisors (1621251496520).

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

1257023706040 is a wasteful number, since it uses less digits than its factorization.

1257023706040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564372 (or 1564368 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 1257023706040 in words is "one trillion, two hundred fifty-seven billion, twenty-three million, seven hundred six thousand, forty".