2261564402542 has 16 divisors (see below), whose sum is σ = 3531676469760. Its totient is φ = 1084835632608.

The previous prime is 2261564402509. The next prime is 2261564402563. The reversal of 2261564402542 is 2452044651622.

It is a super-2 number, since 2×2261564402542² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124170798 + ... + 124189009.

It is an arithmetic number, because the mean of its divisors is an integer number (220729779360).

Almost surely, 2^{2261564402542} is an apocalyptic number.

2261564402542 is a deficient number, since it is larger than the sum of its proper divisors (1270112067218).

2261564402542 is a wasteful number, since it uses less digits than its factorization.

2261564402542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248359995.

The product of its (nonzero) digits is 921600, while the sum is 43.

The spelling of 2261564402542 in words is "two trillion, two hundred sixty-one billion, five hundred sixty-four million, four hundred two thousand, five hundred forty-two".