140505521520 has 160 divisors (see below), whose sum is σ = 536082688512. Its totient is φ = 29645116416.

The previous prime is 140505521479. The next prime is 140505521539. The reversal of 140505521520 is 25125505041.

It is a super-2 number, since 2×140505521520² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3194862 + ... + 3238541.

Almost surely, 2^140505521520 is an apocalyptic number.

140505521520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140505521520 is an abundant number, since it is smaller than the sum of its proper divisors (395577166992).

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

140505521520 is a wasteful number, since it uses less digits than its factorization.

140505521520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6433439 (or 6433433 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 140505521520 in words is "one hundred forty billion, five hundred five million, five hundred twenty-one thousand, five hundred twenty".