78242744624530 has 16 divisors (see below), whose sum is σ = 140837458589784. Its totient is φ = 31296982679680.

The previous prime is 78242744624507. The next prime is 78242744624563. The reversal of 78242744624530 is 3542644724287.

It can be written as a sum of positive squares in 4 ways, for example, as 63633661739041 + 14609082885489 = 7977071^2 + 3822183^2 .

It is a super-2 number, since 2×78242744624530² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11515477 + ... + 17002696.

Almost surely, 2^{78242744624530} is an apocalyptic number.

78242744624530 is a deficient number, since it is larger than the sum of its proper divisors (62594713965254).

78242744624530 is a wasteful number, since it uses less digits than its factorization.

78242744624530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28792541.

The product of its (nonzero) digits is 72253440, while the sum is 58.

The spelling of 78242744624530 in words is "seventy-eight trillion, two hundred forty-two billion, seven hundred forty-four million, six hundred twenty-four thousand, five hundred thirty".