61526427137657 has 16 divisors (see below), whose sum is σ = 62538351119040. Its totient is φ = 60519096594432.

The previous prime is 61526427137639. The next prime is 61526427137723. The reversal of 61526427137657 is 75673172462516.

It is a cyclic number.

It is not a de Polignac number, because 61526427137657 - 2¹⁰ = 61526427136633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61526427137657.

It is not an unprimeable number, because it can be changed into a prime (61526427134657) 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, 421378418 + ... + 421524404.

It is an arithmetic number, because the mean of its divisors is an integer number (3908646944940).

Almost surely, 2^{61526427137657} is an apocalyptic number.

It is an amenable number.

61526427137657 is a deficient number, since it is larger than the sum of its proper divisors (1011923981383).

61526427137657 is a wasteful number, since it uses less digits than its factorization.

61526427137657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161672.

The product of its digits is 88905600, while the sum is 62.

The spelling of 61526427137657 in words is "sixty-one trillion, five hundred twenty-six billion, four hundred twenty-seven million, one hundred thirty-seven thousand, six hundred fifty-seven".