2145154626651 has 4 divisors (see below), whose sum is σ = 2860206168872. Its totient is φ = 1430103084432.

The previous prime is 2145154626631. The next prime is 2145154626677. The reversal of 2145154626651 is 1566264515412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2145154626651 - 2¹⁷ = 2145154495579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2145154626651.

It is not an unprimeable number, because it can be changed into a prime (2145154626631) 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, 357525771106 + ... + 357525771111.

It is an arithmetic number, because the mean of its divisors is an integer number (715051542218).

Almost surely, 2^{2145154626651} is an apocalyptic number.

2145154626651 is a deficient number, since it is larger than the sum of its proper divisors (715051542221).

2145154626651 is an equidigital number, since it uses as much as digits as its factorization.

2145154626651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715051542220.

The product of its digits is 1728000, while the sum is 48.

The spelling of 2145154626651 in words is "two trillion, one hundred forty-five billion, one hundred fifty-four million, six hundred twenty-six thousand, six hundred fifty-one".