1561397600190 has 32 divisors (see below), whose sum is σ = 3747446460576. Its totient is φ = 416362446720.

The previous prime is 1561397600179. The next prime is 1561397600201. The reversal of 1561397600190 is 910067931651.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1561397600179) and next prime (1561397600201).

It is a super-2 number, since 2×1561397600190² (a number of 25 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 15 ways as a sum of consecutive naturals, for example, 640980 + ... + 1879800.

It is an arithmetic number, because the mean of its divisors is an integer number (117107701893).

Almost surely, 2^{1561397600190} is an apocalyptic number.

1561397600190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1561397600190 is an abundant number, since it is smaller than the sum of its proper divisors (2186048860386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1561397600190 is a wasteful number, since it uses less digits than its factorization.

1561397600190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280844.

The product of its (nonzero) digits is 306180, while the sum is 48.

The spelling of 1561397600190 in words is "one trillion, five hundred sixty-one billion, three hundred ninety-seven million, six hundred thousand, one hundred ninety".