1274398674640 has 800 divisors, whose sum is σ = 4011022920960. Its totient is φ = 367371583488.

The previous prime is 1274398674629. The next prime is 1274398674641. The reversal of 1274398674640 is 464768934721.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1274398674641) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 11691730906 + ... + 11691731014.

Almost surely, 2^{1274398674640} is an apocalyptic number.

1274398674640 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 1274398674640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2005511460480).

1274398674640 is an abundant number, since it is smaller than the sum of its proper divisors (2736624246320).

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

1274398674640 is a wasteful number, since it uses less digits than its factorization.

1274398674640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 61.

The spelling of 1274398674640 in words is "one trillion, two hundred seventy-four billion, three hundred ninety-eight million, six hundred seventy-four thousand, six hundred forty".