7154921294640 has 480 divisors, whose sum is σ = 28115589106176. Its totient is φ = 1596486205440.

The previous prime is 7154921294617. The next prime is 7154921294641. The reversal of 7154921294640 is 464921294517.

7154921294640 is a `hidden beast` number, since 7 + 1 + 5 + 492 + 1 + 2 + 94 + 64 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (7154921294641) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 435815712 + ... + 435832128.

Almost surely, 2^{7154921294640} is an apocalyptic number.

7154921294640 is a gapful number since it is divisible by the number (70) 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 7154921294640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14057794553088).

7154921294640 is an abundant number, since it is smaller than the sum of its proper divisors (20960667811536).

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

7154921294640 is a wasteful number, since it uses less digits than its factorization.

7154921294640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18497 (or 18488 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 7154921294640 in words is "seven trillion, one hundred fifty-four billion, nine hundred twenty-one million, two hundred ninety-four thousand, six hundred forty".