1551156061001 has 4 divisors (see below), whose sum is σ = 1551182857092. Its totient is φ = 1551129264912.

The previous prime is 1551156060997. The next prime is 1551156061061. The reversal of 1551156061001 is 1001606511551.

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

It can be written as a sum of positive squares in 2 ways, for example, as 890048843776 + 661107217225 = 943424^2 + 813085^2 .

It is a cyclic number.

It is not a de Polignac number, because 1551156061001 - 2² = 1551156060997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551156061061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13311026 + ... + 13427051.

It is an arithmetic number, because the mean of its divisors is an integer number (387795714273).

Almost surely, 2^{1551156061001} is an apocalyptic number.

It is an amenable number.

1551156061001 is a deficient number, since it is larger than the sum of its proper divisors (26796091).

1551156061001 is an equidigital number, since it uses as much as digits as its factorization.

1551156061001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26796090.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 1551156061001 in words is "one trillion, five hundred fifty-one billion, one hundred fifty-six million, sixty-one thousand, one".