2721405502157 has 2 divisors, whose sum is σ = 2721405502158. Its totient is φ = 2721405502156.

The previous prime is 2721405502147. The next prime is 2721405502163. The reversal of 2721405502157 is 7512055041272.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2318268127396 + 403137374761 = 1522586^2 + 634931^2 .

It is a cyclic number.

It is not a de Polignac number, because 2721405502157 - 2¹⁶ = 2721405436621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2721405502147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360702751078 + 1360702751079.

It is an arithmetic number, because the mean of its divisors is an integer number (1360702751079).

Almost surely, 2^{2721405502157} is an apocalyptic number.

It is an amenable number.

2721405502157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721405502157 is an equidigital number, since it uses as much as digits as its factorization.

2721405502157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196000, while the sum is 41.

The spelling of 2721405502157 in words is "two trillion, seven hundred twenty-one billion, four hundred five million, five hundred two thousand, one hundred fifty-seven".