1252777541640 has 64 divisors (see below), whose sum is σ = 3780057153600. Its totient is φ = 332142941952.

The previous prime is 1252777541633. The next prime is 1252777541647. The reversal of 1252777541640 is 461457772521.

It is an interprime number because it is at equal distance from previous prime (1252777541633) and next prime (1252777541647).

It is not an unprimeable number, because it can be changed into a prime (1252777541647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30152110 + ... + 30193629.

It is an arithmetic number, because the mean of its divisors is an integer number (59063393025).

Almost surely, 2^{1252777541640} is an apocalyptic number.

1252777541640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252777541640 is an abundant number, since it is smaller than the sum of its proper divisors (2527279611960).

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

1252777541640 is a wasteful number, since it uses less digits than its factorization.

1252777541640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60345926 (or 60345922 counting only the distinct ones).

The product of its (nonzero) digits is 3292800, while the sum is 51.

The spelling of 1252777541640 in words is "one trillion, two hundred fifty-two billion, seven hundred seventy-seven million, five hundred forty-one thousand, six hundred forty".