1012251515640 has 64 divisors (see below), whose sum is σ = 3196583740800. Its totient is φ = 255726698112.

The previous prime is 1012251515609. The next prime is 1012251515647. The reversal of 1012251515640 is 465151522101.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012251515647) 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, 221982702 + ... + 221987261.

It is an arithmetic number, because the mean of its divisors is an integer number (49946620950).

Almost surely, 2^{1012251515640} is an apocalyptic number.

1012251515640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012251515640 is an abundant number, since it is smaller than the sum of its proper divisors (2184332225160).

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

1012251515640 is a wasteful number, since it uses less digits than its factorization.

1012251515640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443969996 (or 443969992 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

The spelling of 1012251515640 in words is "one trillion, twelve billion, two hundred fifty-one million, five hundred fifteen thousand, six hundred forty".