11351731640 has 192 divisors, whose sum is σ = 28841456160. Its totient is φ = 4006379520.

The previous prime is 11351731631. The next prime is 11351731709. The reversal of 11351731640 is 4613715311.

It is a super-2 number, since 2×11351731640² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11351731597 and 11351731606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32157704 + ... + 32158056.

Almost surely, 2^11351731640 is an apocalyptic number.

11351731640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11351731640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14420728080).

11351731640 is an abundant number, since it is smaller than the sum of its proper divisors (17489724520).

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

11351731640 is a wasteful number, since it uses less digits than its factorization.

11351731640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The spelling of 11351731640 in words is "eleven billion, three hundred fifty-one million, seven hundred thirty-one thousand, six hundred forty".