7287761528378 has 16 divisors (see below), whose sum is σ = 11715226525440. Its totient is φ = 3391249782096.

The previous prime is 7287761528371. The next prime is 7287761528477. The reversal of 7287761528378 is 8738251677827.

It is a super-2 number, since 2×7287761528378² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7287761528371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2140938818 + ... + 2140942221.

It is an arithmetic number, because the mean of its divisors is an integer number (732201657840).

Almost surely, 2^{7287761528378} is an apocalyptic number.

7287761528378 is a deficient number, since it is larger than the sum of its proper divisors (4427464997062).

7287761528378 is a wasteful number, since it uses less digits than its factorization.

7287761528378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4281881101.

The product of its digits is 442552320, while the sum is 71.

The spelling of 7287761528378 in words is "seven trillion, two hundred eighty-seven billion, seven hundred sixty-one million, five hundred twenty-eight thousand, three hundred seventy-eight".