2151351463556 has 12 divisors (see below), whose sum is σ = 3856691038620. Its totient is φ = 1049439738240.

The previous prime is 2151351463487. The next prime is 2151351463559. The reversal of 2151351463556 is 6553641531512.

It can be written as a sum of positive squares in 2 ways, for example, as 830194322500 + 1321157141056 = 911150^2 + 1149416^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2151351463556.

It is not an unprimeable number, because it can be changed into a prime (2151351463559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6558998201 + ... + 6558998528.

It is an arithmetic number, because the mean of its divisors is an integer number (321390919885).

Almost surely, 2^{2151351463556} is an apocalyptic number.

It is an amenable number.

2151351463556 is a deficient number, since it is larger than the sum of its proper divisors (1705339575064).

2151351463556 is a wasteful number, since it uses less digits than its factorization.

2151351463556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13117996774 (or 13117996772 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 47.

The spelling of 2151351463556 in words is "two trillion, one hundred fifty-one billion, three hundred fifty-one million, four hundred sixty-three thousand, five hundred fifty-six".