1551056501651 has 4 divisors (see below), whose sum is σ = 1556043821904. Its totient is φ = 1546069181400.

The previous prime is 1551056501647. The next prime is 1551056501653. The reversal of 1551056501651 is 1561056501551.

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

It is a cyclic number.

It is not a de Polignac number, because 1551056501651 - 2² = 1551056501647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1551056501599 and 1551056501608.

It is not an unprimeable number, because it can be changed into a prime (1551056501653) 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, 2493659660 + ... + 2493660281.

It is an arithmetic number, because the mean of its divisors is an integer number (389010955476).

Almost surely, 2^{1551056501651} is an apocalyptic number.

1551056501651 is a deficient number, since it is larger than the sum of its proper divisors (4987320253).

1551056501651 is an equidigital number, since it uses as much as digits as its factorization.

1551056501651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4987320252.

The product of its (nonzero) digits is 112500, while the sum is 41.

The spelling of 1551056501651 in words is "one trillion, five hundred fifty-one billion, fifty-six million, five hundred one thousand, six hundred fifty-one".