2549725101691 has 16 divisors (see below), whose sum is σ = 2666995870464. Its totient is φ = 2432990463904.

The previous prime is 2549725101667. The next prime is 2549725101713. The reversal of 2549725101691 is 1961015279452.

It is a cyclic number.

It is not a de Polignac number, because 2549725101691 - 2¹³ = 2549725093499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2549726101691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85440225 + ... + 85470061.

It is an arithmetic number, because the mean of its divisors is an integer number (166687241904).

Almost surely, 2^{2549725101691} is an apocalyptic number.

2549725101691 is a deficient number, since it is larger than the sum of its proper divisors (117270768773).

2549725101691 is a wasteful number, since it uses less digits than its factorization.

2549725101691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38690.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 2549725101691 in words is "two trillion, five hundred forty-nine billion, seven hundred twenty-five million, one hundred one thousand, six hundred ninety-one".