85078880381 has 16 divisors (see below), whose sum is σ = 93235104000. Its totient is φ = 76993190400.

The previous prime is 85078880377. The next prime is 85078880399. The reversal of 85078880381 is 18308887058.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 85078880381 - 2² = 85078880377 is a prime.

It is a super-2 number, since 2×85078880381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85078880681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12218741 + ... + 12225701.

It is an arithmetic number, because the mean of its divisors is an integer number (5827194000).

Almost surely, 2^85078880381 is an apocalyptic number.

It is an amenable number.

85078880381 is a deficient number, since it is larger than the sum of its proper divisors (8156223619).

85078880381 is a wasteful number, since it uses less digits than its factorization.

85078880381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11860.

The product of its (nonzero) digits is 3440640, while the sum is 56.

It can be divided in two parts, 8507 and 8880381, that added together give a palindrome (8888888).

The spelling of 85078880381 in words is "eighty-five billion, seventy-eight million, eight hundred eighty thousand, three hundred eighty-one".