1245102778040 has 128 divisors (see below), whose sum is σ = 3295476576000. Its totient is φ = 418472985600.

The previous prime is 1245102778001. The next prime is 1245102778099. The reversal of 1245102778040 is 408772015421.

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 1473530 + ... + 2159049.

It is an arithmetic number, because the mean of its divisors is an integer number (25745910750).

Almost surely, 2^{1245102778040} is an apocalyptic number.

1245102778040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245102778040 is an abundant number, since it is smaller than the sum of its proper divisors (2050373797960).

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

1245102778040 is a wasteful number, since it uses less digits than its factorization.

1245102778040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632661 (or 3632657 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The spelling of 1245102778040 in words is "one trillion, two hundred forty-five billion, one hundred two million, seven hundred seventy-eight thousand, forty".