61435258155383 has 16 divisors (see below), whose sum is σ = 74173890078720. Its totient is φ = 49707178795296.

The previous prime is 61435258155373. The next prime is 61435258155407. The reversal of 61435258155383 is 38355185253416.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61435258155383 - 2⁶ = 61435258155319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61435258155373) 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, 833752391 + ... + 833826072.

It is an arithmetic number, because the mean of its divisors is an integer number (4635868129920).

Almost surely, 2^{61435258155383} is an apocalyptic number.

61435258155383 is a deficient number, since it is larger than the sum of its proper divisors (12738631923337).

61435258155383 is a wasteful number, since it uses less digits than its factorization.

61435258155383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667578766.

The product of its digits is 51840000, while the sum is 59.

The spelling of 61435258155383 in words is "sixty-one trillion, four hundred thirty-five billion, two hundred fifty-eight million, one hundred fifty-five thousand, three hundred eighty-three".