1451640542220 has 72 divisors (see below), whose sum is σ = 4803610528080. Its totient is φ = 351912858240.

The previous prime is 1451640542207. The next prime is 1451640542263. The reversal of 1451640542220 is 222450461541.

1451640542220 is a `hidden beast` number, since 1 + 4 + 5 + 1 + 640 + 5 + 4 + 2 + 2 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 366573915 + ... + 366577874.

It is an arithmetic number, because the mean of its divisors is an integer number (66716812890).

Almost surely, 2^{1451640542220} is an apocalyptic number.

1451640542220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1451640542220 is an abundant number, since it is smaller than the sum of its proper divisors (3351969985860).

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

1451640542220 is a wasteful number, since it uses less digits than its factorization.

1451640542220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733151815 (or 733151810 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 1451640542220 in words is "one trillion, four hundred fifty-one billion, six hundred forty million, five hundred forty-two thousand, two hundred twenty".