1401261513550 has 24 divisors (see below), whose sum is σ = 2619850818816. Its totient is φ = 557600432640.

The previous prime is 1401261513539. The next prime is 1401261513593. The reversal of 1401261513550 is 553151621041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72594574 + ... + 72613873.

It is an arithmetic number, because the mean of its divisors is an integer number (109160450784).

Almost surely, 2^{1401261513550} is an apocalyptic number.

1401261513550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1401261513550 is a deficient number, since it is larger than the sum of its proper divisors (1218589305266).

1401261513550 is a wasteful number, since it uses less digits than its factorization.

1401261513550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145208652 (or 145208647 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 1401261513550 in words is "one trillion, four hundred one billion, two hundred sixty-one million, five hundred thirteen thousand, five hundred fifty".