1257601543550 has 96 divisors (see below), whose sum is σ = 2607570247680. Its totient is φ = 447323945600.

The previous prime is 1257601543447. The next prime is 1257601543571. The reversal of 1257601543550 is 553451067521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48507491 + ... + 48533409.

It is an arithmetic number, because the mean of its divisors is an integer number (27162190080).

Almost surely, 2^{1257601543550} is an apocalyptic number.

1257601543550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1257601543550 is an abundant number, since it is smaller than the sum of its proper divisors (1349968704130).

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

1257601543550 is a wasteful number, since it uses less digits than its factorization.

1257601543550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27866 (or 27861 counting only the distinct ones).

The product of its (nonzero) digits is 630000, while the sum is 44.

The spelling of 1257601543550 in words is "one trillion, two hundred fifty-seven billion, six hundred one million, five hundred forty-three thousand, five hundred fifty".