31523778060 has 48 divisors (see below), whose sum is σ = 88280236800. Its totient is φ = 8405040064.

The previous prime is 31523778059. The next prime is 31523778061. The reversal of 31523778060 is 6087732513.

It is an interprime number because it is at equal distance from previous prime (31523778059) and next prime (31523778061).

It is a super-2 number, since 2×31523778060² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31523778061) 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, 387631 + ... + 461849.

It is an arithmetic number, because the mean of its divisors is an integer number (1839171600).

Almost surely, 2^31523778060 is an apocalyptic number.

31523778060 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31523778060 is an abundant number, since it is smaller than the sum of its proper divisors (56756458740).

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

31523778060 is a wasteful number, since it uses less digits than its factorization.

31523778060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81310 (or 81308 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 31523778060 in words is "thirty-one billion, five hundred twenty-three million, seven hundred seventy-eight thousand, sixty".