78038961021392 has 80 divisors (see below), whose sum is σ = 181904867760000. Its totient is φ = 31683329003520.

The previous prime is 78038961021383. The next prime is 78038961021401. The reversal of 78038961021392 is 29312016983087.

It is an interprime number because it is at equal distance from previous prime (78038961021383) and next prime (78038961021401).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40009292 + ... + 41914452.

It is an arithmetic number, because the mean of its divisors is an integer number (2273810847000).

Almost surely, 2^{78038961021392} is an apocalyptic number.

It is an amenable number.

78038961021392 is an abundant number, since it is smaller than the sum of its proper divisors (103865906738608).

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

78038961021392 is a wasteful number, since it uses less digits than its factorization.

78038961021392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924444 (or 1924438 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 59.

It can be divided in two parts, 7803896 and 1021392, that added together give a palindrome (8825288).

The spelling of 78038961021392 in words is "seventy-eight trillion, thirty-eight billion, nine hundred sixty-one million, twenty-one thousand, three hundred ninety-two".