1451640621215 has 8 divisors (see below), whose sum is σ = 1741978781280. Its totient is φ = 1161305806432.

The previous prime is 1451640621163. The next prime is 1451640621217. The reversal of 1451640621215 is 5121260461541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1451640621215 - 2¹⁶ = 1451640555679 is a prime.

It is a super-2 number, since 2×1451640621215² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1451640621217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245582 + ... + 1721508.

It is an arithmetic number, because the mean of its divisors is an integer number (217747347660).

Almost surely, 2^{1451640621215} is an apocalyptic number.

1451640621215 is a deficient number, since it is larger than the sum of its proper divisors (290338160065).

1451640621215 is a wasteful number, since it uses less digits than its factorization.

1451640621215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672641.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 1451640621215 in words is "one trillion, four hundred fifty-one billion, six hundred forty million, six hundred twenty-one thousand, two hundred fifteen".