1925297777401 has 2 divisors, whose sum is σ = 1925297777402. Its totient is φ = 1925297777400.

The previous prime is 1925297777371. The next prime is 1925297777443. The reversal of 1925297777401 is 1047777925291.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1171700167401 + 753597610000 = 1082451^2 + 868100^2 .

It is a cyclic number.

It is not a de Polignac number, because 1925297777401 - 2¹³ = 1925297769209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1925297777401.

It is not a weakly prime, because it can be changed into another prime (1925297727401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962648888700 + 962648888701.

It is an arithmetic number, because the mean of its divisors is an integer number (962648888701).

Almost surely, 2^{1925297777401} is an apocalyptic number.

It is an amenable number.

1925297777401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1925297777401 is an equidigital number, since it uses as much as digits as its factorization.

1925297777401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15558480, while the sum is 61.

The spelling of 1925297777401 in words is "one trillion, nine hundred twenty-five billion, two hundred ninety-seven million, seven hundred seventy-seven thousand, four hundred one".