1371775680 has 672 divisors, whose sum is σ = 5648797440. Its totient is φ = 301916160.

The previous prime is 1371775667. The next prime is 1371775693. The reversal of 1371775680 is 865771731.

1371775680 is a `hidden beast` number, since 13 + 7 + 1 + 77 + 568 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1371775667) and next prime (1371775693).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 25882534 + ... + 25882586.

Almost surely, 2^1371775680 is an apocalyptic number.

1371775680 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 1371775680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2824398720).

1371775680 is an abundant number, since it is smaller than the sum of its proper divisors (4277021760).

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

1371775680 is a wasteful number, since it uses less digits than its factorization.

1371775680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The square root of 1371775680 is about 37037.4901957463. The cubic root of 1371775680 is about 1111.1201742668.

The spelling of 1371775680 in words is "one billion, three hundred seventy-one million, seven hundred seventy-five thousand, six hundred eighty".