2051772556155 has 16 divisors (see below), whose sum is σ = 3751812674304. Its totient is φ = 937953168480.

The previous prime is 2051772556133. The next prime is 2051772556193. The reversal of 2051772556155 is 5516552771502.

It is not a de Polignac number, because 2051772556155 - 2⁵ = 2051772556123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2051772556098 and 2051772556107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9770345401 + ... + 9770345610.

It is an arithmetic number, because the mean of its divisors is an integer number (234488292144).

Almost surely, 2^{2051772556155} is an apocalyptic number.

2051772556155 is a deficient number, since it is larger than the sum of its proper divisors (1700040118149).

2051772556155 is a wasteful number, since it uses less digits than its factorization.

2051772556155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19540691026.

The product of its (nonzero) digits is 3675000, while the sum is 51.

The spelling of 2051772556155 in words is "two trillion, fifty-one billion, seven hundred seventy-two million, five hundred fifty-six thousand, one hundred fifty-five".