1245513177840 has 160 divisors (see below), whose sum is σ = 3966323549760. Its totient is φ = 323088556032.

The previous prime is 1245513177787. The next prime is 1245513177851. The reversal of 1245513177840 is 487713155421.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1245513177840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48622956 + ... + 48648564.

It is an arithmetic number, because the mean of its divisors is an integer number (24789522186).

Almost surely, 2^{1245513177840} is an apocalyptic number.

1245513177840 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 1245513177840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1983161774880).

1245513177840 is an abundant number, since it is smaller than the sum of its proper divisors (2720810371920).

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

1245513177840 is a wasteful number, since it uses less digits than its factorization.

1245513177840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31139 (or 31133 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 48.

The spelling of 1245513177840 in words is "one trillion, two hundred forty-five billion, five hundred thirteen million, one hundred seventy-seven thousand, eight hundred forty".