1257701552540 has 12 divisors (see below), whose sum is σ = 2641173260376. Its totient is φ = 503080621008.

The previous prime is 1257701552509. The next prime is 1257701552551. The reversal of 1257701552540 is 452551077521.

It is a junction number, because it is equal to n+sod(n) for n = 1257701552491 and 1257701552500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31442538794 + ... + 31442538833.

It is an arithmetic number, because the mean of its divisors is an integer number (220097771698).

Almost surely, 2^{1257701552540} is an apocalyptic number.

1257701552540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1257701552540 is an abundant number, since it is smaller than the sum of its proper divisors (1383471707836).

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

1257701552540 is a wasteful number, since it uses less digits than its factorization.

1257701552540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62885077636 (or 62885077634 counting only the distinct ones).

The product of its (nonzero) digits is 490000, while the sum is 44.

The spelling of 1257701552540 in words is "one trillion, two hundred fifty-seven billion, seven hundred one million, five hundred fifty-two thousand, five hundred forty".