3261358391040 has 180 divisors, whose sum is σ = 11669737099944. Its totient is φ = 869695543296.

The previous prime is 3261358391033. The next prime is 3261358391069. The reversal of 3261358391040 is 401938531623.

3261358391040 is a `hidden beast` number, since 3 + 2 + 6 + 13 + 583 + 9 + 10 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15624322 + ... + 15831681.

Almost surely, 2^{3261358391040} is an apocalyptic number.

3261358391040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3261358391040 is an abundant number, since it is smaller than the sum of its proper divisors (8408378708904).

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

3261358391040 is an equidigital number, since it uses as much as digits as its factorization.

3261358391040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31456036 (or 31456013 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 3261358391040 in words is "three trillion, two hundred sixty-one billion, three hundred fifty-eight million, three hundred ninety-one thousand, forty".