1257631483740 has 144 divisors (see below), whose sum is σ = 3697633443840. Its totient is φ = 319047569280.

The previous prime is 1257631483739. The next prime is 1257631483751. The reversal of 1257631483740 is 473841367521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6377541 + ... + 6571779.

Almost surely, 2^{1257631483740} is an apocalyptic number.

1257631483740 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 1257631483740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1848816721920).

1257631483740 is an abundant number, since it is smaller than the sum of its proper divisors (2440001960100).

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

1257631483740 is a wasteful number, since it uses less digits than its factorization.

1257631483740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194400 (or 194339 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 1257631483740 in words is "one trillion, two hundred fifty-seven billion, six hundred thirty-one million, four hundred eighty-three thousand, seven hundred forty".