1379790659780 has 96 divisors (see below), whose sum is σ = 3141407917536. Its totient is φ = 506041675776.

The previous prime is 1379790659747. The next prime is 1379790659789. The reversal of 1379790659780 is 879560979731.

It can be written as a sum of positive squares in 16 ways, for example, as 453007071364 + 926783588416 = 673058^2 + 962696^2 .

It is a super-2 number, since 2×1379790659780² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1379790659789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221935232 + ... + 221941448.

It is an arithmetic number, because the mean of its divisors is an integer number (32722999141).

Almost surely, 2^{1379790659780} is an apocalyptic number.

1379790659780 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 1379790659780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1570703958768).

1379790659780 is an abundant number, since it is smaller than the sum of its proper divisors (1761617257756).

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

1379790659780 is a wasteful number, since it uses less digits than its factorization.

1379790659780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11833 (or 11831 counting only the distinct ones).

The product of its (nonzero) digits is 180033840, while the sum is 71.

The spelling of 1379790659780 in words is "one trillion, three hundred seventy-nine billion, seven hundred ninety million, six hundred fifty-nine thousand, seven hundred eighty".