742677157672561 has 2 divisors, whose sum is σ = 742677157672562. Its totient is φ = 742677157672560.

The previous prime is 742677157672553. The next prime is 742677157672573. The reversal of 742677157672561 is 165276751776247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 589597312640625 + 153079845031936 = 24281625^2 + 12372544^2 .

It is a cyclic number.

It is not a de Polignac number, because 742677157672561 - 2³ = 742677157672553 is a prime.

It is not a weakly prime, because it can be changed into another prime (742677157672511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371338578836280 + 371338578836281.

It is an arithmetic number, because the mean of its divisors is an integer number (371338578836281).

Almost surely, 2^{742677157672561} is an apocalyptic number.

It is an amenable number.

742677157672561 is a deficient number, since it is larger than the sum of its proper divisors (1).

742677157672561 is an equidigital number, since it uses as much as digits as its factorization.

742677157672561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1452124800, while the sum is 73.

The spelling of 742677157672561 in words is "seven hundred forty-two trillion, six hundred seventy-seven billion, one hundred fifty-seven million, six hundred seventy-two thousand, five hundred sixty-one".