2151365446620 has 72 divisors (see below), whose sum is σ = 7027793799936. Its totient is φ = 529566878592.

The previous prime is 2151365446603. The next prime is 2151365446621. The reversal of 2151365446620 is 266445631512.

2151365446620 is a `hidden beast` number, since 2 + 1 + 5 + 13 + 6 + 5 + 4 + 4 + 6 + 620 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151365446621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 459691132 + ... + 459695811.

Almost surely, 2^{2151365446620} is an apocalyptic number.

2151365446620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151365446620 is an abundant number, since it is smaller than the sum of its proper divisors (4876428353316).

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

2151365446620 is a wasteful number, since it uses less digits than its factorization.

2151365446620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919386971 (or 919386966 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 2151365446620 in words is "two trillion, one hundred fifty-one billion, three hundred sixty-five million, four hundred forty-six thousand, six hundred twenty".