85777131480 has 64 divisors (see below), whose sum is σ = 266204901600. Its totient is φ = 22085145600.

The previous prime is 85777131383. The next prime is 85777131481. The reversal of 85777131480 is 8413177758.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85777131481) 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, 12320821 + ... + 12327780.

Almost surely, 2^85777131480 is an apocalyptic number.

It is an amenable number.

85777131480 is an abundant number, since it is smaller than the sum of its proper divisors (180427770120).

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

85777131480 is a wasteful number, since it uses less digits than its factorization.

85777131480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24648644 (or 24648640 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 51.

The spelling of 85777131480 in words is "eighty-five billion, seven hundred seventy-seven million, one hundred thirty-one thousand, four hundred eighty".